Support regexp rule type

Compatible with V2Ray rules

docs/content/advance/router.md

@@ -69,7 +69,7 @@ Trojan-Go内建的路由模块可以帮助你实现国内直连，即客户端
 
 - "full:"，完全域名匹配
 
-- "regex:"，正则表达式匹配
+- "regexp:"，正则表达式匹配
 
 - "cidr:"，CIDR匹配
 

tunnel/router/client.go

@@ -418,6 +418,19 @@ func NewClient(ctx context.Context, underlay tunnel.Client) (*Client, error) {
 		})
 	}
 
+	// Just for compatibility with V2Ray rule type `regexp`
+	regexpInfo := loadCode(cfg, "regexp:")
+	for _, info := range regexpInfo {
+		if _, err := regexp.Compile(info.code); err != nil {
+			return nil, common.NewError("invalid regular expression: " + info.code).Base(err)
+		}
+		client.domains[info.strategy] = append(client.domains[info.strategy], &v2router.Domain{
+			Type:      v2router.Domain_Regex,
+			Value:     info.code,
+			Attribute: nil,
+		})
+	}
+
 	fullInfo := loadCode(cfg, "full:")
 	for _, info := range fullInfo {
 		client.domains[info.strategy] = append(client.domains[info.strategy], &v2router.Domain{

tunnel/router/router_test.go

@@ -77,11 +77,11 @@ router:
     - "full:localhost"
     - "domain:bypass.com"
     block:
-    - "regex:blockreg(.*)"
+    - "regexp:blockreg(.*)"
     - "full:blockfull"
     - "domain:block.com"
     proxy:
-    - "regex:proxyreg(.*)"
+    - "regexp:proxyreg(.*)"
     - "full:proxyfull"
     - "domain:proxy.com"
     - "cidr:192.168.1.1/16"