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Code Issues Releases Wiki Activity

Feat: DNS hosts support multiple addresses (#884)

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Loyalsoldier 2021-04-10 21:56:08 +08:00 committed by GitHub
parent 400dc15c00
commit bada0e48b4
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GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 182 additions and 122 deletions
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2
app/dns/dns.go
View File

@ -214,7 +214,7 @@ func (s *DNS) lookupIPInternal(domain string, option dns.IPOption) ([]net.IP, er
newError("domain replaced: ", domain, " -> ", addrs[0].Domain()).WriteToLog()
domain = addrs[0].Domain()
default: // Successfully found ip records in static host
newError("returning ", len(addrs), " IPs for domain ", domain).WriteToLog()
newError("returning ", len(addrs), " IPs for domain ", domain, " -> ", addrs).WriteToLog()
return toNetIP(addrs)
}

5
app/dns/hosts.go
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@ -65,11 +65,6 @@ func NewStaticHosts(hosts []*Config_HostMapping, legacy map[string]*net.IPOrDoma
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
}

1
app/dns/hosts_test.go
View File

@ -32,6 +32,7 @@ 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},
},
},
}

282
infra/conf/dns.go
View File

@ -125,7 +125,7 @@ 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 *HostsWrapper `json:"hosts"`
ClientIP *Address `json:"clientIp"`
Tag string `json:"tag"`
QueryStrategy string `json:"queryStrategy"`
@ -133,15 +133,174 @@ type DNSConfig struct {
DisableFallback bool `json:"disableFallback"`
}
func getHostMapping(addr *Address) *dns.Config_HostMapping {
if addr.Family().IsIP() {
type HostAddress struct {
addr *Address
addrs []*Address
}
// 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
}
type HostsWrapper struct {
Hosts map[string]*HostAddress
}
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{[]byte(addr.IP())},
Ip: [][]byte{ha.addr.IP()},
}
}
return &dns.Config_HostMapping{
ProxiedDomain: addr.Domain(),
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,
}
}
// UnmarshalJSON implements encoding/json.Unmarshaler.UnmarshalJSON
func (m *HostsWrapper) UnmarshalJSON(data []byte) error {
hosts := make(map[string]*HostAddress)
err := json.Unmarshal(data, &hosts)
if err == nil {
m.Hosts = hosts
return nil
}
return newError("invalid DNS hosts").Base(err)
}
// Build implements Buildable
func (m *HostsWrapper) Build() ([]*dns.Config_HostMapping, error) {
mappings := make([]*dns.Config_HostMapping, 0, 20)
domains := make([]string, 0, len(m.Hosts))
for domain := range m.Hosts {
domains = append(domains, domain)
}
sort.Strings(domains)
for _, domain := range domains {
switch {
case strings.HasPrefix(domain, "domain:"):
domainName := domain[7:]
if len(domainName) == 0 {
return nil, newError("empty domain type of rule: ", domain)
}
mapping := getHostMapping(m.Hosts[domain])
mapping.Type = dns.DomainMatchingType_Subdomain
mapping.Domain = domainName
mappings = append(mappings, mapping)
case strings.HasPrefix(domain, "geosite:"):
listName := domain[8:]
if len(listName) == 0 {
return nil, newError("empty geosite rule: ", domain)
}
geositeList, err := loadGeosite(listName)
if err != nil {
return nil, newError("failed to load geosite: ", listName).Base(err)
}
for _, d := range geositeList {
mapping := getHostMapping(m.Hosts[domain])
mapping.Type = typeMap[d.Type]
mapping.Domain = d.Value
mappings = append(mappings, mapping)
}
case strings.HasPrefix(domain, "regexp:"):
regexpVal := domain[7:]
if len(regexpVal) == 0 {
return nil, newError("empty regexp type of rule: ", domain)
}
mapping := getHostMapping(m.Hosts[domain])
mapping.Type = dns.DomainMatchingType_Regex
mapping.Domain = regexpVal
mappings = append(mappings, mapping)
case strings.HasPrefix(domain, "keyword:"):
keywordVal := domain[8:]
if len(keywordVal) == 0 {
return nil, newError("empty keyword type of rule: ", domain)
}
mapping := getHostMapping(m.Hosts[domain])
mapping.Type = dns.DomainMatchingType_Keyword
mapping.Domain = keywordVal
mappings = append(mappings, mapping)
case strings.HasPrefix(domain, "full:"):
fullVal := domain[5:]
if len(fullVal) == 0 {
return nil, newError("empty full domain type of rule: ", domain)
}
mapping := getHostMapping(m.Hosts[domain])
mapping.Type = dns.DomainMatchingType_Full
mapping.Domain = fullVal
mappings = append(mappings, mapping)
case strings.HasPrefix(domain, "dotless:"):
mapping := getHostMapping(m.Hosts[domain])
mapping.Type = dns.DomainMatchingType_Regex
switch substr := domain[8:]; {
case substr == "":
mapping.Domain = "^[^.]*$"
case !strings.Contains(substr, "."):
mapping.Domain = "^[^.]*" + substr + "[^.]*$"
default:
return nil, newError("substr in dotless rule should not contain a dot: ", substr)
}
mappings = append(mappings, mapping)
case strings.HasPrefix(domain, "ext:"):
kv := strings.Split(domain[4:], ":")
if len(kv) != 2 {
return nil, newError("invalid external resource: ", domain)
}
filename := kv[0]
list := kv[1]
geositeList, err := loadGeositeWithAttr(filename, list)
if err != nil {
return nil, newError("failed to load domain list: ", list, " from ", filename).Base(err)
}
for _, d := range geositeList {
mapping := getHostMapping(m.Hosts[domain])
mapping.Type = typeMap[d.Type]
mapping.Domain = d.Value
mappings = append(mappings, mapping)
}
default:
mapping := getHostMapping(m.Hosts[domain])
mapping.Type = dns.DomainMatchingType_Full
mapping.Domain = domain
mappings = append(mappings, mapping)
}
}
return mappings, nil
}
// Build implements Buildable
@ -177,113 +336,12 @@ func (c *DNSConfig) Build() (*dns.Config, error) {
config.NameServer = append(config.NameServer, ns)
}
if c.Hosts != nil && len(c.Hosts) > 0 {
domains := make([]string, 0, len(c.Hosts))
for domain := range c.Hosts {
domains = append(domains, domain)
}
sort.Strings(domains)
for _, domain := range domains {
addr := c.Hosts[domain]
var mappings []*dns.Config_HostMapping
switch {
case strings.HasPrefix(domain, "domain:"):
domainName := domain[7:]
if len(domainName) == 0 {
return nil, newError("empty domain type of rule: ", domain)
}
mapping := getHostMapping(addr)
mapping.Type = dns.DomainMatchingType_Subdomain
mapping.Domain = domainName
mappings = append(mappings, mapping)
case strings.HasPrefix(domain, "geosite:"):
listName := domain[8:]
if len(listName) == 0 {
return nil, newError("empty geosite rule: ", domain)
}
domains, err := loadGeosite(listName)
if err != nil {
return nil, newError("failed to load geosite: ", listName).Base(err)
}
for _, d := range domains {
mapping := getHostMapping(addr)
mapping.Type = typeMap[d.Type]
mapping.Domain = d.Value
mappings = append(mappings, mapping)
}
case strings.HasPrefix(domain, "regexp:"):
regexpVal := domain[7:]
if len(regexpVal) == 0 {
return nil, newError("empty regexp type of rule: ", domain)
}
mapping := getHostMapping(addr)
mapping.Type = dns.DomainMatchingType_Regex
mapping.Domain = regexpVal
mappings = append(mappings, mapping)
case strings.HasPrefix(domain, "keyword:"):
keywordVal := domain[8:]
if len(keywordVal) == 0 {
return nil, newError("empty keyword type of rule: ", domain)
}
mapping := getHostMapping(addr)
mapping.Type = dns.DomainMatchingType_Keyword
mapping.Domain = keywordVal
mappings = append(mappings, mapping)
case strings.HasPrefix(domain, "full:"):
fullVal := domain[5:]
if len(fullVal) == 0 {
return nil, newError("empty full domain type of rule: ", domain)
}
mapping := getHostMapping(addr)
mapping.Type = dns.DomainMatchingType_Full
mapping.Domain = fullVal
mappings = append(mappings, mapping)
case strings.HasPrefix(domain, "dotless:"):
mapping := getHostMapping(addr)
mapping.Type = dns.DomainMatchingType_Regex
switch substr := domain[8:]; {
case substr == "":
mapping.Domain = "^[^.]*$"
case !strings.Contains(substr, "."):
mapping.Domain = "^[^.]*" + substr + "[^.]*$"
default:
return nil, newError("substr in dotless rule should not contain a dot: ", substr)
}
mappings = append(mappings, mapping)
case strings.HasPrefix(domain, "ext:"):
kv := strings.Split(domain[4:], ":")
if len(kv) != 2 {
return nil, newError("invalid external resource: ", domain)
}
filename := kv[0]
list := kv[1]
domains, err := loadGeositeWithAttr(filename, list)
if err != nil {
return nil, newError("failed to load domain list: ", list, " from ", filename).Base(err)
}
for _, d := range domains {
mapping := getHostMapping(addr)
mapping.Type = typeMap[d.Type]
mapping.Domain = d.Value
mappings = append(mappings, mapping)
}
default:
mapping := getHostMapping(addr)
mapping.Type = dns.DomainMatchingType_Full
mapping.Domain = domain
mappings = append(mappings, mapping)
}
config.StaticHosts = append(config.StaticHosts, mappings...)
if c.Hosts != nil {
staticHosts, err := c.Hosts.Build()
if err != nil {
return nil, newError("failed to build hosts").Base(err)
}
config.StaticHosts = append(config.StaticHosts, staticHosts...)
}
return config, nil

14
infra/conf/dns_test.go
View File

@ -69,9 +69,10 @@ func TestDNSConfigParsing(t *testing.T) {
}],
"hosts": {
"v2fly.org": "127.0.0.1",
"www.v2fly.org": ["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",
@ -117,12 +118,12 @@ func TestDNSConfigParsing(t *testing.T) {
{
Type: dns.DomainMatchingType_Full,
Domain: "test.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,
@ -134,6 +135,11 @@ func TestDNSConfigParsing(t *testing.T) {
Domain: "v2fly.org",
Ip: [][]byte{{127, 0, 0, 1}},
},
{
Type: dns.DomainMatchingType_Full,
Domain: "www.v2fly.org",
Ip: [][]byte{{1, 2, 3, 4}, {5, 6, 7, 8}},
},
},
ClientIp: []byte{10, 0, 0, 1},
QueryStrategy: dns.QueryStrategy_USE_IP4,