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Feat: DNS hosts support multiple addresses

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秋のかえで 2021-04-11 23:07:48 +08:00
parent 598e15aed2
commit 7cf30d5101
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GPG key ID: B208CDDD55BEF92C
7 changed files with 106 additions and 31 deletions
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3
app/dns/config.pb.go
View file

@ -510,8 +510,7 @@ type Config_HostMapping struct {
Domain string `protobuf:"bytes,2,opt,name=domain,proto3" json:"domain,omitempty"`
Ip [][]byte `protobuf:"bytes,3,rep,name=ip,proto3" json:"ip,omitempty"`
// ProxiedDomain indicates the mapped domain has the same IP address on this
// domain. Xray will use this domain for IP queries. This field is only
// effective if ip is empty.
// domain. Xray will use this domain for IP queries.
ProxiedDomain string `protobuf:"bytes,4,opt,name=proxied_domain,json=proxiedDomain,proto3" json:"proxied_domain,omitempty"`
}

3
app/dns/config.proto
View file

@ -73,8 +73,7 @@ message Config {
repeated bytes ip = 3;
// ProxiedDomain indicates the mapped domain has the same IP address on this
// domain. Xray will use this domain for IP queries. This field is only
// effective if ip is empty.
// domain. Xray will use this domain for IP queries.
string proxied_domain = 4;
}

2
app/dns/dns.go
View file

@ -222,7 +222,7 @@ func (s *DNS) lookupIPInternal(domain string, option *dns.IPOption) ([]net.IP, e
// Successfully found ip records in static host.
// Skip hosts mapping result in FakeDNS query.
if isIPQuery(option) {
newError("returning ", len(addrs), " IPs for domain ", domain).WriteToLog()
newError("returning ", len(addrs), " IP(s) for domain ", domain, " -> ", addrs).WriteToLog()
return toNetIP(addrs)
}
}

12
app/dns/hosts.go
View file

@ -47,6 +47,9 @@ func NewStaticHosts(hosts []*Config_HostMapping, legacy map[string]*net.IPOrDoma
id := g.Add(matcher)
ips := make([]net.Address, 0, len(mapping.Ip)+1)
switch {
case len(mapping.ProxiedDomain) > 0:
ips = append(ips, net.DomainAddress(mapping.ProxiedDomain))
case len(mapping.Ip) > 0:
for _, ip := range mapping.Ip {
addr := net.IPAddress(ip)
@ -56,18 +59,10 @@ func NewStaticHosts(hosts []*Config_HostMapping, legacy map[string]*net.IPOrDoma
ips = append(ips, addr)
}
case len(mapping.ProxiedDomain) > 0:
ips = append(ips, net.DomainAddress(mapping.ProxiedDomain))
default:
return nil, newError("neither IP address nor proxied domain specified for domain: ", mapping.Domain).AtWarning()
}
// Special handling for localhost IPv6. This is a dirty workaround as JSON config supports only single IP mapping.
if len(ips) == 1 && ips[0] == net.LocalHostIP {
ips = append(ips, net.LocalHostIPv6)
}
sh.ips[id] = ips
}
@ -100,6 +95,7 @@ func (h *StaticHosts) lookup(domain string, option *dns.IPOption, maxDepth int)
case len(addrs) == 0: // Not recorded in static hosts, return nil
return nil
case len(addrs) == 1 && addrs[0].Family().IsDomain(): // Try to unwrap domain
newError("found replaced domain: ", domain, " -> ", addrs[0].Domain(), ". Try to unwrap it").AtDebug().WriteToLog()
if maxDepth > 0 {
unwrapped := h.lookup(addrs[0].Domain(), option, maxDepth-1)
if unwrapped != nil {

41
app/dns/hosts_test.go
View file

@ -20,6 +20,20 @@ func TestStaticHosts(t *testing.T) {
{1, 1, 1, 1},
},
},
{
Type: DomainMatchingType_Full,
Domain: "proxy.example.com",
Ip: [][]byte{
{1, 2, 3, 4},
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
},
ProxiedDomain: "another-proxy.example.com",
},
{
Type: DomainMatchingType_Full,
Domain: "proxy2.example.com",
ProxiedDomain: "proxy.example.com",
},
{
Type: DomainMatchingType_Subdomain,
Domain: "example.cn",
@ -32,6 +46,7 @@ func TestStaticHosts(t *testing.T) {
Domain: "baidu.com",
Ip: [][]byte{
{127, 0, 0, 1},
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
},
},
}
@ -52,6 +67,32 @@ func TestStaticHosts(t *testing.T) {
}
}
{
domain := hosts.Lookup("proxy.example.com", &dns.IPOption{
IPv4Enable: true,
IPv6Enable: false,
})
if len(domain) != 1 {
t.Error("expect 1 domain, but got ", len(domain))
}
if diff := cmp.Diff(domain[0].Domain(), "another-proxy.example.com"); diff != "" {
t.Error(diff)
}
}
{
domain := hosts.Lookup("proxy2.example.com", &dns.IPOption{
IPv4Enable: true,
IPv6Enable: false,
})
if len(domain) != 1 {
t.Error("expect 1 domain, but got ", len(domain))
}
if diff := cmp.Diff(domain[0].Domain(), "another-proxy.example.com"); diff != "" {
t.Error(diff)
}
}
{
ips := hosts.Lookup("www.example.cn", &dns.IPOption{
IPv4Enable: true,

46
infra/conf/dns.go
View file

@ -124,7 +124,7 @@ var typeMap = map[router.Domain_Type]dns.DomainMatchingType{
// DNSConfig is a JSON serializable object for dns.Config.
type DNSConfig struct {
Servers []*NameServerConfig `json:"servers"`
Hosts map[string]*Address `json:"hosts"`
Hosts map[string]*HostAddress `json:"hosts"`
ClientIP *Address `json:"clientIp"`
Tag string `json:"tag"`
QueryStrategy string `json:"queryStrategy"`
@ -133,16 +133,50 @@ type DNSConfig struct {
DisableFallback bool `json:"disableFallback"`
}
func getHostMapping(addr *Address) *dns.Config_HostMapping {
if addr.Family().IsIP() {
return &dns.Config_HostMapping{
Ip: [][]byte{[]byte(addr.IP())},
type HostAddress struct {
addr *Address
addrs []*Address
}
} else {
// UnmarshalJSON implements encoding/json.Unmarshaler.UnmarshalJSON
func (h *HostAddress) UnmarshalJSON(data []byte) error {
addr := new(Address)
var addrs []*Address
switch {
case json.Unmarshal(data, &addr) == nil:
h.addr = addr
case json.Unmarshal(data, &addrs) == nil:
h.addrs = addrs
default:
return newError("invalid address")
}
return nil
}
func getHostMapping(ha *HostAddress) *dns.Config_HostMapping {
if ha.addr != nil {
if ha.addr.Family().IsDomain() {
return &dns.Config_HostMapping{
ProxiedDomain: ha.addr.Domain(),
}
}
return &dns.Config_HostMapping{
Ip: [][]byte{ha.addr.IP()},
}
}
ips := make([][]byte, 0, len(ha.addrs))
for _, addr := range ha.addrs {
if addr.Family().IsDomain() {
return &dns.Config_HostMapping{
ProxiedDomain: addr.Domain(),
}
}
ips = append(ips, []byte(addr.IP()))
}
return &dns.Config_HostMapping{
Ip: ips,
}
}
// Build implements Buildable

14
infra/conf/dns_test.go
View file

@ -74,9 +74,10 @@ func TestDNSConfigParsing(t *testing.T) {
}],
"hosts": {
"example.com": "127.0.0.1",
"xtls.github.io": ["1.2.3.4", "5.6.7.8"],
"domain:example.com": "google.com",
"geosite:test": "10.0.0.1",
"keyword:google": "8.8.8.8",
"geosite:test": ["127.0.0.1", "127.0.0.2"],
"keyword:google": ["8.8.8.8", "8.8.4.4"],
"regexp:.*\\.com": "8.8.4.4"
},
"clientIp": "10.0.0.1",
@ -127,18 +128,23 @@ func TestDNSConfigParsing(t *testing.T) {
{
Type: dns.DomainMatchingType_Full,
Domain: "example.com",
Ip: [][]byte{{10, 0, 0, 1}},
Ip: [][]byte{{127, 0, 0, 1}, {127, 0, 0, 2}},
},
{
Type: dns.DomainMatchingType_Keyword,
Domain: "google",
Ip: [][]byte{{8, 8, 8, 8}},
Ip: [][]byte{{8, 8, 8, 8}, {8, 8, 4, 4}},
},
{
Type: dns.DomainMatchingType_Regex,
Domain: ".*\\.com",
Ip: [][]byte{{8, 8, 4, 4}},
},
{
Type: dns.DomainMatchingType_Full,
Domain: "xtls.github.io",
Ip: [][]byte{{1, 2, 3, 4}, {5, 6, 7, 8}},
},
},
ClientIp: []byte{10, 0, 0, 1},
QueryStrategy: dns.QueryStrategy_USE_IP4,