Add tun platform options

option/platform.go

@@ -0,0 +1,104 @@
+package option
+
+import (
+	"github.com/sagernet/sing-box/common/json"
+	E "github.com/sagernet/sing/common/exceptions"
+)
+
+type OnDemandOptions struct {
+	Enabled bool           `json:"enabled,omitempty"`
+	Rules   []OnDemandRule `json:"rules,omitempty"`
+}
+
+type OnDemandRule struct {
+	Action                *OnDemandRuleAction        `json:"action,omitempty"`
+	DNSSearchDomainMatch  Listable[string]           `json:"dns_search_domain_match,omitempty"`
+	DNSServerAddressMatch Listable[string]           `json:"dns_server_address_match,omitempty"`
+	InterfaceTypeMatch    *OnDemandRuleInterfaceType `json:"interface_type_match,omitempty"`
+	SSIDMatch             Listable[string]           `json:"ssid_match,omitempty"`
+	ProbeURL              string                     `json:"probe_url,omitempty"`
+}
+
+type OnDemandRuleAction int
+
+func (r *OnDemandRuleAction) MarshalJSON() ([]byte, error) {
+	if r == nil {
+		return nil, nil
+	}
+	value := *r
+	var actionName string
+	switch value {
+	case 1:
+		actionName = "connect"
+	case 2:
+		actionName = "disconnect"
+	case 3:
+		actionName = "evaluate_connection"
+	default:
+		return nil, E.New("unknown action: ", value)
+	}
+	return json.Marshal(actionName)
+}
+
+func (r *OnDemandRuleAction) UnmarshalJSON(bytes []byte) error {
+	var actionName string
+	if err := json.Unmarshal(bytes, &actionName); err != nil {
+		return err
+	}
+	var actionValue int
+	switch actionName {
+	case "connect":
+		actionValue = 1
+	case "disconnect":
+		actionValue = 2
+	case "evaluate_connection":
+		actionValue = 3
+	case "ignore":
+		actionValue = 4
+	default:
+		return E.New("unknown action name: ", actionName)
+	}
+	*r = OnDemandRuleAction(actionValue)
+	return nil
+}
+
+type OnDemandRuleInterfaceType int
+
+func (r *OnDemandRuleInterfaceType) MarshalJSON() ([]byte, error) {
+	if r == nil {
+		return nil, nil
+	}
+	value := *r
+	var interfaceTypeName string
+	switch value {
+	case 1:
+		interfaceTypeName = "any"
+	case 2:
+		interfaceTypeName = "wifi"
+	case 3:
+		interfaceTypeName = "cellular"
+	default:
+		return nil, E.New("unknown interface type: ", value)
+	}
+	return json.Marshal(interfaceTypeName)
+}
+
+func (r *OnDemandRuleInterfaceType) UnmarshalJSON(bytes []byte) error {
+	var interfaceTypeName string
+	if err := json.Unmarshal(bytes, &interfaceTypeName); err != nil {
+		return err
+	}
+	var interfaceTypeValue int
+	switch interfaceTypeName {
+	case "any":
+		interfaceTypeValue = 1
+	case "wifi":
+		interfaceTypeValue = 2
+	case "cellular":
+		interfaceTypeValue = 3
+	default:
+		return E.New("unknown interface type name: ", interfaceTypeName)
+	}
+	*r = OnDemandRuleInterfaceType(interfaceTypeValue)
+	return nil
+}