Direct/Freedom outbound: Add blockDelay to finalRules (30~90s by default) (#6060)

Document: https://xtls.github.io/config/outbounds/freedom.html#finalruleobject

#6058 (comment)
#6058 (comment)
#6060 (comment)
#6060 (comment)

Author: Meo597

infra/conf/freedom.go

@@ -44,10 +44,11 @@ type Noise struct {
 }
 
 type FreedomFinalRuleConfig struct {
-	Action  string       `json:"action"`
-	Network *NetworkList `json:"network"`
-	Port    *PortList    `json:"port"`
-	IP      *StringList  `json:"ip"`
+	Action     string       `json:"action"`
+	Network    *NetworkList `json:"network"`
+	Port       *PortList    `json:"port"`
+	IP         *StringList  `json:"ip"`
+	BlockDelay *Int32Range  `json:"blockDelay"`
 }
 
 // Build implements Buildable
@@ -276,5 +277,12 @@ func (c *FreedomFinalRuleConfig) Build() (*freedom.FinalRuleConfig, error) {
 		rule.Ip = rules
 	}
 
+	if c.BlockDelay != nil {
+		rule.BlockDelay = &freedom.Range{
+			Min: uint64(c.BlockDelay.From),
+			Max: uint64(c.BlockDelay.To),
+		}
+	}
+
 	return rule, nil
 }

infra/conf/freedom_test.go

@@ -45,7 +45,8 @@ func TestFreedomConfig(t *testing.T) {
 					"action": "block",
 					"network": "tcp,udp",
 					"port": "53,443",
-					"ip": ["10.0.0.0/8", "2001:db8::/32"]
+					"ip": ["10.0.0.0/8", "2001:db8::/32"],
+					"blockDelay": "30-60"
 				}, {
 					"action": "allow",
 					"network": ["udp"]
@@ -85,6 +86,10 @@ func TestFreedomConfig(t *testing.T) {
 								},
 							},
 						},
+						BlockDelay: &freedom.Range{
+							Min: 30,
+							Max: 60,
+						},
 					},
 					{
 						Action:   freedom.RuleAction_Allow,

proxy/freedom/config.pb.go

@@ -36,6 +36,11 @@ message Noise {
   string apply_to = 6;
 }
 
+message Range {
+  uint64 min = 1;
+  uint64 max = 2;
+}
+
 enum RuleAction {
   Allow = 0;
   Block = 1;
@@ -46,6 +51,7 @@ message FinalRuleConfig {
   repeated xray.common.net.Network networks = 2;
   xray.common.net.PortList port_list = 3;
   repeated xray.common.geodata.IPRule ip = 4;
+  Range block_delay = 5;
 }
 
 message Config {