Crazy sekai overturns the small pond

option/inbound.go

@@ -98,6 +98,7 @@ func (h *Inbound) UnmarshalJSON(bytes []byte) error {
 	return nil
 }
 
+// Deprecated: Use rule action instead
 type InboundOptions struct {
 	SniffEnabled              bool           `json:"sniff,omitempty"`
 	SniffOverrideDestination  bool           `json:"sniff_override_destination,omitempty"`

option/rule.go

@@ -64,7 +64,7 @@ func (r Rule) IsValid() bool {
 	}
 }
 
-type DefaultRule struct {
+type RawDefaultRule struct {
 	Inbound                  Listable[string] `json:"inbound,omitempty"`
 	IPVersion                int              `json:"ip_version,omitempty"`
 	Network                  Listable[string] `json:"network,omitempty"`
@@ -98,26 +98,58 @@ type DefaultRule struct {
 	RuleSet                  Listable[string] `json:"rule_set,omitempty"`
 	RuleSetIPCIDRMatchSource bool             `json:"rule_set_ip_cidr_match_source,omitempty"`
 	Invert                   bool             `json:"invert,omitempty"`
-	Outbound                 string           `json:"outbound,omitempty"`
 
 	// Deprecated: renamed to rule_set_ip_cidr_match_source
 	Deprecated_RulesetIPCIDRMatchSource bool `json:"rule_set_ipcidr_match_source,omitempty"`
 }
 
+type DefaultRule struct {
+	RawDefaultRule
+	RuleAction
+}
+
+func (r *DefaultRule) MarshalJSON() ([]byte, error) {
+	return MarshallObjects(r.RawDefaultRule, r.RuleAction)
+}
+
+func (r *DefaultRule) UnmarshalJSON(data []byte) error {
+	err := json.Unmarshal(data, &r.RawDefaultRule)
+	if err != nil {
+		return err
+	}
+	return UnmarshallExcluded(data, &r.RawDefaultRule, &r.RuleAction)
+}
+
 func (r *DefaultRule) IsValid() bool {
 	var defaultValue DefaultRule
 	defaultValue.Invert = r.Invert
-	defaultValue.Outbound = r.Outbound
+	defaultValue.Action = r.Action
 	return !reflect.DeepEqual(r, defaultValue)
 }
 
-type LogicalRule struct {
-	Mode     string `json:"mode"`
-	Rules    []Rule `json:"rules,omitempty"`
-	Invert   bool   `json:"invert,omitempty"`
-	Outbound string `json:"outbound,omitempty"`
+type _LogicalRule struct {
+	Mode   string `json:"mode"`
+	Rules  []Rule `json:"rules,omitempty"`
+	Invert bool   `json:"invert,omitempty"`
 }
 
-func (r LogicalRule) IsValid() bool {
+type LogicalRule struct {
+	_LogicalRule
+	RuleAction
+}
+
+func (r *LogicalRule) MarshalJSON() ([]byte, error) {
+	return MarshallObjects(r._LogicalRule, r.RuleAction)
+}
+
+func (r *LogicalRule) UnmarshalJSON(data []byte) error {
+	err := json.Unmarshal(data, &r._LogicalRule)
+	if err != nil {
+		return err
+	}
+	return UnmarshallExcluded(data, &r._LogicalRule, &r.RuleAction)
+}
+
+func (r *LogicalRule) IsValid() bool {
 	return len(r.Rules) > 0 && common.All(r.Rules, Rule.IsValid)
 }

option/rule_action.go

@@ -0,0 +1,166 @@
+package option
+
+import (
+	C "github.com/sagernet/sing-box/constant"
+	E "github.com/sagernet/sing/common/exceptions"
+	"github.com/sagernet/sing/common/json"
+)
+
+type _RuleAction struct {
+	Action         string              `json:"action,omitempty"`
+	RouteOptions   RouteActionOptions  `json:"-"`
+	RejectOptions  RejectActionOptions `json:"-"`
+	SniffOptions   RouteActionSniff    `json:"-"`
+	ResolveOptions RouteActionResolve  `json:"-"`
+}
+
+type RuleAction _RuleAction
+
+func (r RuleAction) MarshalJSON() ([]byte, error) {
+	var v any
+	switch r.Action {
+	case C.RuleActionTypeRoute:
+		r.Action = ""
+		v = r.RouteOptions
+	case C.RuleActionTypeReturn:
+		v = nil
+	case C.RuleActionTypeReject:
+		v = r.RejectOptions
+	case C.RuleActionTypeHijackDNS:
+		v = nil
+	case C.RuleActionTypeSniff:
+		v = r.SniffOptions
+	case C.RuleActionTypeResolve:
+		v = r.ResolveOptions
+	default:
+		return nil, E.New("unknown rule action: " + r.Action)
+	}
+	if v == nil {
+		return MarshallObjects((_RuleAction)(r))
+	}
+	return MarshallObjects((_RuleAction)(r), v)
+}
+
+func (r *RuleAction) UnmarshalJSON(data []byte) error {
+	err := json.Unmarshal(data, (*_RuleAction)(r))
+	if err != nil {
+		return err
+	}
+	var v any
+	switch r.Action {
+	case "", C.RuleActionTypeRoute:
+		r.Action = C.RuleActionTypeRoute
+		v = &r.RouteOptions
+	case C.RuleActionTypeReturn:
+		v = nil
+	case C.RuleActionTypeReject:
+		v = &r.RejectOptions
+	case C.RuleActionTypeHijackDNS:
+		v = nil
+	case C.RuleActionTypeSniff:
+		v = &r.SniffOptions
+	case C.RuleActionTypeResolve:
+		v = &r.ResolveOptions
+	default:
+		return E.New("unknown rule action: " + r.Action)
+	}
+	if v == nil {
+		// check unknown fields
+		return json.UnmarshalDisallowUnknownFields(data, &_RuleAction{})
+	}
+	return UnmarshallExcluded(data, (*_RuleAction)(r), v)
+}
+
+type _DNSRuleAction struct {
+	Action         string                `json:"action,omitempty"`
+	RouteOptions   DNSRouteActionOptions `json:"-"`
+	RejectOptions  RejectActionOptions   `json:"-"`
+	SniffOptions   RouteActionSniff      `json:"-"`
+	ResolveOptions RouteActionResolve    `json:"-"`
+}
+
+type DNSRuleAction _DNSRuleAction
+
+func (r DNSRuleAction) MarshalJSON() ([]byte, error) {
+	var v any
+	switch r.Action {
+	case C.RuleActionTypeRoute:
+		r.Action = ""
+		v = r.RouteOptions
+	case C.RuleActionTypeReturn:
+		v = nil
+	case C.RuleActionTypeReject:
+		v = r.RejectOptions
+	default:
+		return nil, E.New("unknown DNS rule action: " + r.Action)
+	}
+	if v == nil {
+		return MarshallObjects((_DNSRuleAction)(r))
+	}
+	return MarshallObjects((_DNSRuleAction)(r), v)
+}
+
+func (r *DNSRuleAction) UnmarshalJSON(data []byte) error {
+	err := json.Unmarshal(data, (*_DNSRuleAction)(r))
+	if err != nil {
+		return err
+	}
+	var v any
+	switch r.Action {
+	case "", C.RuleActionTypeRoute:
+		r.Action = C.RuleActionTypeRoute
+		v = &r.RouteOptions
+	case C.RuleActionTypeReturn:
+		v = nil
+	case C.RuleActionTypeReject:
+		v = &r.RejectOptions
+	default:
+		return E.New("unknown DNS rule action: " + r.Action)
+	}
+	if v == nil {
+		// check unknown fields
+		return json.UnmarshalDisallowUnknownFields(data, &_DNSRuleAction{})
+	}
+	return UnmarshallExcluded(data, (*_DNSRuleAction)(r), v)
+}
+
+type RouteActionOptions struct {
+	Outbound                  string `json:"outbound"`
+	UDPDisableDomainUnmapping bool   `json:"udp_disable_domain_unmapping,omitempty"`
+}
+
+type DNSRouteActionOptions struct {
+	Server       string      `json:"server"`
+	DisableCache bool        `json:"disable_cache,omitempty"`
+	RewriteTTL   *uint32     `json:"rewrite_ttl,omitempty"`
+	ClientSubnet *AddrPrefix `json:"client_subnet,omitempty"`
+}
+
+type RejectActionOptions struct {
+	Method RejectMethod `json:"method,omitempty"`
+}
+
+type RejectMethod string
+
+func (m *RejectMethod) UnmarshalJSON(bytes []byte) error {
+	err := json.Unmarshal(bytes, (*string)(m))
+	if err != nil {
+		return err
+	}
+	switch *m {
+	case C.RuleActionRejectMethodDefault, C.RuleActionRejectMethodPortUnreachable, C.RuleActionRejectMethodDrop:
+		return nil
+	default:
+		return E.New("unknown reject method: " + *m)
+	}
+}
+
+type RouteActionSniff struct {
+	Sniffer Listable[string] `json:"sniffer,omitempty"`
+	Timeout Duration         `json:"timeout,omitempty"`
+}
+
+type RouteActionResolve struct {
+	Strategy DomainStrategy `json:"strategy,omitempty"`
+	Server   string         `json:"server,omitempty"`
+}

option/rule_dns.go

@@ -64,7 +64,7 @@ func (r DNSRule) IsValid() bool {
 	}
 }
 
-type DefaultDNSRule struct {
+type RawDefaultDNSRule struct {
 	Inbound                  Listable[string]       `json:"inbound,omitempty"`
 	IPVersion                int                    `json:"ip_version,omitempty"`
 	QueryType                Listable[DNSQueryType] `json:"query_type,omitempty"`
@@ -100,35 +100,58 @@ type DefaultDNSRule struct {
 	RuleSetIPCIDRMatchSource bool                   `json:"rule_set_ip_cidr_match_source,omitempty"`
 	RuleSetIPCIDRAcceptEmpty bool                   `json:"rule_set_ip_cidr_accept_empty,omitempty"`
 	Invert                   bool                   `json:"invert,omitempty"`
-	Server                   string                 `json:"server,omitempty"`
-	DisableCache             bool                   `json:"disable_cache,omitempty"`
-	RewriteTTL               *uint32                `json:"rewrite_ttl,omitempty"`
-	ClientSubnet             *AddrPrefix            `json:"client_subnet,omitempty"`
 
 	// Deprecated: renamed to rule_set_ip_cidr_match_source
 	Deprecated_RulesetIPCIDRMatchSource bool `json:"rule_set_ipcidr_match_source,omitempty"`
 }
 
+type DefaultDNSRule struct {
+	RawDefaultDNSRule
+	DNSRuleAction
+}
+
+func (r *DefaultDNSRule) MarshalJSON() ([]byte, error) {
+	return MarshallObjects(r.RawDefaultDNSRule, r.DNSRuleAction)
+}
+
+func (r *DefaultDNSRule) UnmarshalJSON(data []byte) error {
+	err := json.Unmarshal(data, &r.RawDefaultDNSRule)
+	if err != nil {
+		return err
+	}
+	return UnmarshallExcluded(data, &r.RawDefaultDNSRule, &r.DNSRuleAction)
+}
+
 func (r *DefaultDNSRule) IsValid() bool {
 	var defaultValue DefaultDNSRule
 	defaultValue.Invert = r.Invert
-	defaultValue.Server = r.Server
-	defaultValue.DisableCache = r.DisableCache
-	defaultValue.RewriteTTL = r.RewriteTTL
-	defaultValue.ClientSubnet = r.ClientSubnet
+	defaultValue.DNSRuleAction = r.DNSRuleAction
 	return !reflect.DeepEqual(r, defaultValue)
 }
 
-type LogicalDNSRule struct {
-	Mode         string      `json:"mode"`
-	Rules        []DNSRule   `json:"rules,omitempty"`
-	Invert       bool        `json:"invert,omitempty"`
-	Server       string      `json:"server,omitempty"`
-	DisableCache bool        `json:"disable_cache,omitempty"`
-	RewriteTTL   *uint32     `json:"rewrite_ttl,omitempty"`
-	ClientSubnet *AddrPrefix `json:"client_subnet,omitempty"`
+type _LogicalDNSRule struct {
+	Mode   string    `json:"mode"`
+	Rules  []DNSRule `json:"rules,omitempty"`
+	Invert bool      `json:"invert,omitempty"`
 }
 
-func (r LogicalDNSRule) IsValid() bool {
+type LogicalDNSRule struct {
+	_LogicalDNSRule
+	DNSRuleAction
+}
+
+func (r *LogicalDNSRule) MarshalJSON() ([]byte, error) {
+	return MarshallObjects(r._LogicalDNSRule, r.DNSRuleAction)
+}
+
+func (r *LogicalDNSRule) UnmarshalJSON(data []byte) error {
+	err := json.Unmarshal(data, &r._LogicalDNSRule)
+	if err != nil {
+		return err
+	}
+	return UnmarshallExcluded(data, &r._LogicalDNSRule, &r.DNSRuleAction)
+}
+
+func (r *LogicalDNSRule) IsValid() bool {
 	return len(r.Rules) > 0 && common.All(r.Rules, DNSRule.IsValid)
 }

option/types.go

@@ -81,8 +81,11 @@ func (a *AddrPrefix) UnmarshalJSON(content []byte) error {
 	return prefixErr
 }
 
-func (a AddrPrefix) Build() netip.Prefix {
-	return netip.Prefix(a)
+func (a *AddrPrefix) Build() netip.Prefix {
+	if a == nil {
+		return netip.Prefix{}
+	}
+	return netip.Prefix(*a)
 }
 
 type NetworkList string
@@ -143,12 +146,29 @@ func (l *Listable[T]) UnmarshalJSON(content []byte) error {
 
 type DomainStrategy dns.DomainStrategy
 
+func (s DomainStrategy) String() string {
+	switch dns.DomainStrategy(s) {
+	case dns.DomainStrategyAsIS:
+		return ""
+	case dns.DomainStrategyPreferIPv4:
+		return "prefer_ipv4"
+	case dns.DomainStrategyPreferIPv6:
+		return "prefer_ipv6"
+	case dns.DomainStrategyUseIPv4:
+		return "ipv4_only"
+	case dns.DomainStrategyUseIPv6:
+		return "ipv6_only"
+	default:
+		panic(E.New("unknown domain strategy: ", s))
+	}
+}
+
 func (s DomainStrategy) MarshalJSON() ([]byte, error) {
 	var value string
 	switch dns.DomainStrategy(s) {
 	case dns.DomainStrategyAsIS:
 		value = ""
-		// value = "AsIS"
+		// value = "as_is"
 	case dns.DomainStrategyPreferIPv4:
 		value = "prefer_ipv4"
 	case dns.DomainStrategyPreferIPv6: