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Add custom prefix support in EDNS0 client subnet options

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世界 2024-05-12 15:06:21 +08:00
parent 0e120f8a44
commit da9e22b4e6
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15 changed files with 96 additions and 41 deletions
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2
adapter/router.go
View file

@ -86,7 +86,7 @@ type DNSRule interface {
Rule
DisableCache() bool
RewriteTTL() *uint32
ClientSubnet() *netip.Addr
ClientSubnet() *netip.Prefix
WithAddressLimit() bool
MatchAddressLimit(metadata *InboundContext) bool
}

4
docs/configuration/dns/index.md
View file

@ -73,6 +73,8 @@ problematic in environments such as macOS, where DNS is proxied and cached by th
!!! question "Since sing-box 1.9.0"
Append a `edns0-subnet` OPT extra record with the specified IP address to every query by default.
Append a `edns0-subnet` OPT extra record with the specified IP prefix to every query by default.
If value is an IP address instead of prefix, `/32` or `/128` will be appended automatically.
Can be overrides by `servers.[].client_subnet` or `rules.[].client_subnet`.

4
docs/configuration/dns/index.zh.md
View file

@ -71,7 +71,9 @@ icon: material/new-box
!!! question "自 sing-box 1.9.0 起"
默认情况下，将带有指定 IP 地址的 `edns0-subnet` OPT 附加记录附加到每个查询。
默认情况下，将带有指定 IP 前缀的 `edns0-subnet` OPT 附加记录附加到每个查询。
如果值是 IP 地址而不是前缀，则会自动附加 `/32` 或 `/128`。
可以被 `servers.[].client_subnet` 或 `rules.[].client_subnet` 覆盖。

8
docs/configuration/dns/rule.md
View file

@ -125,7 +125,7 @@ icon: material/new-box
"server": "local",
"disable_cache": false,
"rewrite_ttl": 100,
"client_subnet": "127.0.0.1"
"client_subnet": "127.0.0.1/24"
},
{
"type": "logical",
@ -134,7 +134,7 @@ icon: material/new-box
"server": "local",
"disable_cache": false,
"rewrite_ttl": 100,
"client_subnet": "127.0.0.1"
"client_subnet": "127.0.0.1/24"
}
]
}
@ -339,7 +339,9 @@ Rewrite TTL in DNS responses.
!!! question "Since sing-box 1.9.0"
Append a `edns0-subnet` OPT extra record with the specified IP address to every query by default.
Append a `edns0-subnet` OPT extra record with the specified IP prefix to every query by default.
If value is an IP address instead of prefix, `/32` or `/128` will be appended automatically.
Will overrides `dns.client_subnet` and `servers.[].client_subnet`.

8
docs/configuration/dns/rule.zh.md
View file

@ -124,7 +124,7 @@ icon: material/new-box
],
"server": "local",
"disable_cache": false,
"client_subnet": "127.0.0.1"
"client_subnet": "127.0.0.1/24"
},
{
"type": "logical",
@ -132,7 +132,7 @@ icon: material/new-box
"rules": [],
"server": "local",
"disable_cache": false,
"client_subnet": "127.0.0.1"
"client_subnet": "127.0.0.1/24"
}
]
}
@ -337,7 +337,9 @@ DNS 查询类型。值可以为整数或者类型名称字符串。
!!! question "自 sing-box 1.9.0 起"
默认情况下，将带有指定 IP 地址的 `edns0-subnet` OPT 附加记录附加到每个查询。
默认情况下，将带有指定 IP 前缀的 `edns0-subnet` OPT 附加记录附加到每个查询。
如果值是 IP 地址而不是前缀，则会自动附加 `/32` 或 `/128`。
将覆盖 `dns.client_subnet` 与 `servers.[].client_subnet`。

4
docs/configuration/dns/server.md
View file

@ -100,7 +100,9 @@ Default outbound will be used if empty.
!!! question "Since sing-box 1.9.0"
Append a `edns0-subnet` OPT extra record with the specified IP address to every query by default.
Append a `edns0-subnet` OPT extra record with the specified IP prefix to every query by default.
If value is an IP address instead of prefix, `/32` or `/128` will be appended automatically.
Can be overrides by `rules.[].client_subnet`.

4
docs/configuration/dns/server.zh.md
View file

@ -100,7 +100,9 @@ DNS 服务器的地址。
!!! question "自 sing-box 1.9.0 起"
默认情况下，将带有指定 IP 地址的 `edns0-subnet` OPT 附加记录附加到每个查询。
默认情况下，将带有指定 IP 前缀的 `edns0-subnet` OPT 附加记录附加到每个查询。
如果值是 IP 地址而不是前缀，则会自动附加 `/32` 或 `/128`。
可以被 `rules.[].client_subnet` 覆盖。

2
docs/manual/proxy/client.md
View file

@ -441,7 +441,7 @@ flowchart TB
{
"rule_set": "geoip-cn",
"server": "google",
"client_subnet": "114.114.114.114" // Any China client IP address
"client_subnet": "114.114.114.114/24" // Any China client IP address
}
]
},

1
experimental/cachefile/cache.go
View file

@ -57,6 +57,7 @@ type CacheFile struct {
type saveRDRCCacheKey struct {
TransportName string
QuestionName string
QType uint16
}
func New(ctx context.Context, options option.CacheFileOptions) *CacheFile {

28
experimental/cachefile/rdrc.go
View file

@ -9,7 +9,7 @@ import (
"github.com/sagernet/sing/common/logger"
)
var bucketRDRC = []byte("rdrc")
var bucketRDRC = []byte("rdrc2")
func (c *CacheFile) StoreRDRC() bool {
return c.storeRDRC
@ -19,13 +19,17 @@ func (c *CacheFile) RDRCTimeout() time.Duration {
return c.rdrcTimeout
}
func (c *CacheFile) LoadRDRC(transportName string, qName string) (rejected bool) {
func (c *CacheFile) LoadRDRC(transportName string, qName string, qType uint16) (rejected bool) {
c.saveRDRCAccess.RLock()
rejected, cached := c.saveRDRC[saveRDRCCacheKey{transportName, qName}]
rejected, cached := c.saveRDRC[saveRDRCCacheKey{transportName, qName, qType}]
c.saveRDRCAccess.RUnlock()
if cached {
return
}
key := buf.Get(2 + len(qName))
binary.BigEndian.PutUint16(key, qType)
copy(key[2:], qName)
defer buf.Put(key)
var deleteCache bool
err := c.DB.View(func(tx *bbolt.Tx) error {
bucket := c.bucket(tx, bucketRDRC)
@ -36,7 +40,7 @@ func (c *CacheFile) LoadRDRC(transportName string, qName string) (rejected bool)
if bucket == nil {
return nil
}
content := bucket.Get([]byte(qName))
content := bucket.Get(key)
if content == nil {
return nil
}
@ -61,13 +65,13 @@ func (c *CacheFile) LoadRDRC(transportName string, qName string) (rejected bool)
if bucket == nil {
return nil
}
return bucket.Delete([]byte(qName))
return bucket.Delete(key)
})
}
return
}
func (c *CacheFile) SaveRDRC(transportName string, qName string) error {
func (c *CacheFile) SaveRDRC(transportName string, qName string, qType uint16) error {
return c.DB.Batch(func(tx *bbolt.Tx) error {
bucket, err := c.createBucket(tx, bucketRDRC)
if err != nil {
@ -77,20 +81,24 @@ func (c *CacheFile) SaveRDRC(transportName string, qName string) error {
if err != nil {
return err
}
key := buf.Get(2 + len(qName))
binary.BigEndian.PutUint16(key, qType)
copy(key[2:], qName)
defer buf.Put(key)
expiresAt := buf.Get(8)
defer buf.Put(expiresAt)
binary.BigEndian.PutUint64(expiresAt, uint64(time.Now().Add(c.rdrcTimeout).Unix()))
return bucket.Put([]byte(qName), expiresAt)
return bucket.Put(key, expiresAt)
})
}
func (c *CacheFile) SaveRDRCAsync(transportName string, qName string, logger logger.Logger) {
saveKey := saveRDRCCacheKey{transportName, qName}
func (c *CacheFile) SaveRDRCAsync(transportName string, qName string, qType uint16, logger logger.Logger) {
saveKey := saveRDRCCacheKey{transportName, qName, qType}
c.saveRDRCAccess.Lock()
c.saveRDRC[saveKey] = true
c.saveRDRCAccess.Unlock()
go func() {
err := c.SaveRDRC(transportName, qName)
err := c.SaveRDRC(transportName, qName, qType)
if err != nil {
logger.Warn("save RDRC: ", err)
}

4
option/dns.go
View file

@ -19,7 +19,7 @@ type DNSServerOptions struct {
AddressFallbackDelay Duration `json:"address_fallback_delay,omitempty"`
Strategy DomainStrategy `json:"strategy,omitempty"`
Detour string `json:"detour,omitempty"`
ClientSubnet *ListenAddress `json:"client_subnet,omitempty"`
ClientSubnet *AddrPrefix `json:"client_subnet,omitempty"`
}
type DNSClientOptions struct {
@ -27,7 +27,7 @@ type DNSClientOptions struct {
DisableCache bool `json:"disable_cache,omitempty"`
DisableExpire bool `json:"disable_expire,omitempty"`
IndependentCache bool `json:"independent_cache,omitempty"`
ClientSubnet *ListenAddress `json:"client_subnet,omitempty"`
ClientSubnet *AddrPrefix `json:"client_subnet,omitempty"`
}
type DNSFakeIPOptions struct {

4
option/rule_dns.go
View file

@ -101,7 +101,7 @@ type DefaultDNSRule struct {
Server string `json:"server,omitempty"`
DisableCache bool `json:"disable_cache,omitempty"`
RewriteTTL *uint32 `json:"rewrite_ttl,omitempty"`
ClientSubnet *ListenAddress `json:"client_subnet,omitempty"`
ClientSubnet *AddrPrefix `json:"client_subnet,omitempty"`
}
func (r DefaultDNSRule) IsValid() bool {
@ -121,7 +121,7 @@ type LogicalDNSRule struct {
Server string `json:"server,omitempty"`
DisableCache bool `json:"disable_cache,omitempty"`
RewriteTTL *uint32 `json:"rewrite_ttl,omitempty"`
ClientSubnet *ListenAddress `json:"client_subnet,omitempty"`
ClientSubnet *AddrPrefix `json:"client_subnet,omitempty"`
}
func (r LogicalDNSRule) IsValid() bool {

34
option/types.go
View file

@ -51,6 +51,40 @@ func (a *ListenAddress) Build() netip.Addr {
return (netip.Addr)(*a)
}
type AddrPrefix netip.Prefix
func (a AddrPrefix) MarshalJSON() ([]byte, error) {
prefix := netip.Prefix(a)
if prefix.Bits() == prefix.Addr().BitLen() {
return json.Marshal(prefix.Addr().String())
} else {
return json.Marshal(prefix.String())
}
}
func (a *AddrPrefix) UnmarshalJSON(content []byte) error {
var value string
err := json.Unmarshal(content, &value)
if err != nil {
return err
}
prefix, prefixErr := netip.ParsePrefix(value)
if prefixErr == nil {
*a = AddrPrefix(prefix)
return nil
}
addr, addrErr := netip.ParseAddr(value)
if addrErr == nil {
*a = AddrPrefix(netip.PrefixFrom(addr, addr.BitLen()))
return nil
}
return prefixErr
}
func (a AddrPrefix) Build() netip.Prefix {
return netip.Prefix(a)
}
type NetworkList string
func (v *NetworkList) UnmarshalJSON(content []byte) error {

4
route/router.go
View file

@ -27,7 +27,7 @@ import (
"github.com/sagernet/sing-box/outbound"
"github.com/sagernet/sing-box/transport/fakeip"
"github.com/sagernet/sing-dns"
mux "github.com/sagernet/sing-mux"
"github.com/sagernet/sing-mux"
"github.com/sagernet/sing-tun"
"github.com/sagernet/sing-vmess"
"github.com/sagernet/sing/common"
@ -235,7 +235,7 @@ func NewRouter(
return nil, E.New("parse dns server[", tag, "]: missing address_resolver")
}
}
var clientSubnet netip.Addr
var clientSubnet netip.Prefix
if server.ClientSubnet != nil {
clientSubnet = server.ClientSubnet.Build()
} else if dnsOptions.ClientSubnet != nil {

12
route/rule_dns.go
View file

@ -40,7 +40,7 @@ type DefaultDNSRule struct {
abstractDefaultRule
disableCache bool
rewriteTTL *uint32
clientSubnet *netip.Addr
clientSubnet *netip.Prefix
}
func NewDefaultDNSRule(router adapter.Router, logger log.ContextLogger, options option.DefaultDNSRule) (*DefaultDNSRule, error) {
@ -51,7 +51,7 @@ func NewDefaultDNSRule(router adapter.Router, logger log.ContextLogger, options
},
disableCache: options.DisableCache,
rewriteTTL: options.RewriteTTL,
clientSubnet: (*netip.Addr)(options.ClientSubnet),
clientSubnet: (*netip.Prefix)(options.ClientSubnet),
}
if len(options.Inbound) > 0 {
item := NewInboundRule(options.Inbound)
@ -234,7 +234,7 @@ func (r *DefaultDNSRule) RewriteTTL() *uint32 {
return r.rewriteTTL
}
func (r *DefaultDNSRule) ClientSubnet() *netip.Addr {
func (r *DefaultDNSRule) ClientSubnet() *netip.Prefix {
return r.clientSubnet
}
@ -272,7 +272,7 @@ type LogicalDNSRule struct {
abstractLogicalRule
disableCache bool
rewriteTTL *uint32
clientSubnet *netip.Addr
clientSubnet *netip.Prefix
}
func NewLogicalDNSRule(router adapter.Router, logger log.ContextLogger, options option.LogicalDNSRule) (*LogicalDNSRule, error) {
@ -284,7 +284,7 @@ func NewLogicalDNSRule(router adapter.Router, logger log.ContextLogger, options
},
disableCache: options.DisableCache,
rewriteTTL: options.RewriteTTL,
clientSubnet: (*netip.Addr)(options.ClientSubnet),
clientSubnet: (*netip.Prefix)(options.ClientSubnet),
}
switch options.Mode {
case C.LogicalTypeAnd:
@ -312,7 +312,7 @@ func (r *LogicalDNSRule) RewriteTTL() *uint32 {
return r.rewriteTTL
}
func (r *LogicalDNSRule) ClientSubnet() *netip.Addr {
func (r *LogicalDNSRule) ClientSubnet() *netip.Prefix {
return r.clientSubnet
}