Inbound rule support

option/route.go

@@ -0,0 +1,80 @@
+package option
+
+import (
+	"encoding/json"
+
+	C "github.com/sagernet/sing-box/constant"
+	E "github.com/sagernet/sing/common/exceptions"
+)
+
+var ErrUnknownRuleType = E.New("unknown rule type")
+
+type _Rule struct {
+	Type           string      `json:"type"`
+	DefaultOptions DefaultRule `json:"default_options,omitempty"`
+	LogicalOptions LogicalRule `json:"logical_options,omitempty"`
+}
+
+type Rule _Rule
+
+func (r *Rule) MarshalJSON() ([]byte, error) {
+	var content map[string]any
+	switch r.Type {
+	case "", C.RuleTypeDefault:
+		return json.Marshal(r.DefaultOptions)
+	case C.RuleTypeLogical:
+		options, err := json.Marshal(r.LogicalOptions)
+		if err != nil {
+			return nil, err
+		}
+		err = json.Unmarshal(options, &content)
+		if err != nil {
+			return nil, err
+		}
+		content["type"] = r.Type
+		return json.Marshal(content)
+	default:
+		return nil, E.Extend(ErrUnknownRuleType, r.Type)
+	}
+}
+
+func (r *Rule) UnmarshalJSON(bytes []byte) error {
+	err := json.Unmarshal(bytes, (*_Rule)(r))
+	if err != nil {
+		return err
+	}
+	switch r.Type {
+	case "", C.RuleTypeDefault:
+		err = json.Unmarshal(bytes, &r.DefaultOptions)
+	case C.RuleTypeLogical:
+		err = json.Unmarshal(bytes, &r.LogicalOptions)
+	default:
+		err = E.Extend(ErrUnknownRuleType, r.Type)
+	}
+	return err
+}
+
+type DefaultRule struct {
+	Inbound       []string `json:"inbound,omitempty"`
+	IPVersion     []int    `json:"ip_version,omitempty"`
+	Network       []string `json:"network,omitempty"`
+	Protocol      []string `json:"protocol,omitempty"`
+	Domain        []string `json:"domain,omitempty"`
+	DomainSuffix  []string `json:"domain_suffix,omitempty"`
+	DomainKeyword []string `json:"domain_keyword,omitempty"`
+	SourceGeoIP   []string `json:"source_geoip,omitempty"`
+	GeoIP         []string `json:"geoip,omitempty"`
+	SourceIPCIDR  []string `json:"source_ipcidr,omitempty"`
+	SourcePort    []string `json:"source_port,omitempty"`
+	IPCIDR        []string `json:"destination_ipcidr,omitempty"`
+	Port          []string `json:"destination_port,omitempty"`
+	ProcessName   []string `json:"process_name,omitempty"`
+	ProcessPath   []string `json:"process_path,omitempty"`
+	Outbound      string   `json:"outbound,omitempty"`
+}
+
+type LogicalRule struct {
+	Mode     string        `json:"mode"`
+	Rules    []DefaultRule `json:"rules,omitempty"`
+	Outbound string        `json:"outbound,omitempty"`
+}