找不到匹配的域名时自动记录日志、默认防cc攻击

internal/nodes/http_request_mismatch.go

@@ -0,0 +1,68 @@
+// Copyright 2022 Liuxiangchao iwind.liu@gmail.com. All rights reserved. Official site: https://goedge.cn .
+
+package nodes
+
+import (
+	"github.com/TeaOSLab/EdgeCommon/pkg/nodeutils"
+	"github.com/TeaOSLab/EdgeCommon/pkg/serverconfigs"
+	"github.com/TeaOSLab/EdgeCommon/pkg/serverconfigs/firewallconfigs"
+	"github.com/TeaOSLab/EdgeNode/internal/ttlcache"
+	"github.com/TeaOSLab/EdgeNode/internal/waf"
+	"net/http"
+	"time"
+)
+
+// 域名无匹配情况处理
+func (this *HTTPRequest) doMismatch() {
+	// 是否为健康检查
+	var healthCheckKey = this.RawReq.Header.Get(serverconfigs.HealthCheckHeaderName)
+	if len(healthCheckKey) > 0 {
+		_, err := nodeutils.Base64DecodeMap(healthCheckKey)
+		if err == nil {
+			this.writer.WriteHeader(http.StatusOK)
+			return
+		}
+	}
+
+	// 是否已经在黑名单
+	var remoteIP = this.RemoteAddr()
+	if waf.SharedIPBlackList.Contains(waf.IPTypeAll, firewallconfigs.FirewallScopeGlobal, 0, remoteIP) {
+		this.Close()
+		return
+	}
+
+	// 根据配置进行相应的处理
+	if sharedNodeConfig.GlobalConfig != nil && sharedNodeConfig.GlobalConfig.HTTPAll.MatchDomainStrictly {
+		// 检查cc
+		// TODO 可以在管理端配置是否开启以及最多尝试次数
+		if len(remoteIP) > 0 {
+			const maxAttempts = 100
+			if ttlcache.SharedCache.IncreaseInt64("MISMATCH_DOMAIN:"+remoteIP, int64(1), time.Now().Unix()+60, false) > maxAttempts {
+				// 在加入之前再次检查黑名单
+				if !waf.SharedIPBlackList.Contains(waf.IPTypeAll, firewallconfigs.FirewallScopeGlobal, 0, remoteIP) {
+					waf.SharedIPBlackList.RecordIP(waf.IPTypeAll, firewallconfigs.FirewallScopeGlobal, 0, remoteIP, time.Now().Unix()+int64(3600), 0, true, 0, 0, "access mismatch domain '"+this.RawReq.Host+"' too frequently")
+				}
+			}
+		}
+
+		// 处理当前连接
+		var httpAllConfig = sharedNodeConfig.GlobalConfig.HTTPAll
+		var mismatchAction = httpAllConfig.DomainMismatchAction
+		if mismatchAction != nil && mismatchAction.Code == "page" {
+			if mismatchAction.Options != nil {
+				this.writer.Header().Set("Content-Type", "text/html; charset=utf-8")
+				this.writer.WriteHeader(mismatchAction.Options.GetInt("statusCode"))
+				_, _ = this.writer.Write([]byte(mismatchAction.Options.GetString("contentHTML")))
+			} else {
+				http.Error(this.writer, "404 page not found: '"+this.URL()+"'", http.StatusNotFound)
+			}
+			return
+		} else {
+			http.Error(this.writer, "404 page not found: '"+this.URL()+"'", http.StatusNotFound)
+			this.Close()
+			return
+		}
+	}
+
+	http.Error(this.writer, "404 page not found: '"+this.URL()+"'", http.StatusNotFound)
+}