将IP加入黑名单时，同时也会关闭此IP相关的连接

internal/conns/map.go

@@ -0,0 +1,117 @@
+// Copyright 2022 Liuxiangchao iwind.liu@gmail.com. All rights reserved. Official site: https://goedge.cn .
+
+package conns
+
+import (
+	"net"
+	"sync"
+)
+
+var SharedMap = NewMap()
+
+type Map struct {
+	m map[string]map[int]net.Conn // ip => { port => Conn }
+
+	locker sync.RWMutex
+}
+
+func NewMap() *Map {
+	return &Map{
+		m: map[string]map[int]net.Conn{},
+	}
+}
+
+func (this *Map) Add(conn net.Conn) {
+	if conn == nil {
+		return
+	}
+	tcpAddr, ok := conn.RemoteAddr().(*net.TCPAddr)
+	if !ok {
+		return
+	}
+
+	var ip = tcpAddr.IP.String()
+	var port = tcpAddr.Port
+
+	this.locker.Lock()
+	defer this.locker.Unlock()
+	connMap, ok := this.m[ip]
+	if !ok {
+		this.m[ip] = map[int]net.Conn{
+			port: conn,
+		}
+	} else {
+		connMap[port] = conn
+	}
+}
+
+func (this *Map) Remove(conn net.Conn) {
+	if conn == nil {
+		return
+	}
+	tcpAddr, ok := conn.RemoteAddr().(*net.TCPAddr)
+	if !ok {
+		return
+	}
+
+	var ip = tcpAddr.IP.String()
+	var port = tcpAddr.Port
+
+	this.locker.Lock()
+	defer this.locker.Unlock()
+
+	connMap, ok := this.m[ip]
+	if !ok {
+		return
+	}
+	delete(connMap, port)
+
+	if len(connMap) == 0 {
+		delete(this.m, ip)
+	}
+}
+
+func (this *Map) CountIPConns(ip string) int {
+	this.locker.RLock()
+	var l = len(this.m[ip])
+	this.locker.RUnlock()
+	return l
+}
+
+func (this *Map) CloseIPConns(ip string) {
+	var conns = []net.Conn{}
+
+	this.locker.RLock()
+	connMap, ok := this.m[ip]
+
+	// 复制，防止在Close时产生并发冲突
+	if ok {
+		for _, conn := range connMap {
+			conns = append(conns, conn)
+		}
+	}
+
+	// 需要在Close之前结束，防止死循环
+	this.locker.RUnlock()
+
+	if ok {
+		for _, conn := range conns {
+			_ = conn.Close()
+		}
+
+		// 这里不需要从 m 中删除，因为关闭时会自然触发回调
+	}
+}
+
+func (this *Map) AllConns() []net.Conn {
+	this.locker.RLock()
+	defer this.locker.RUnlock()
+
+	var result = []net.Conn{}
+	for _, m := range this.m {
+		for _, conn := range m {
+			result = append(result, conn)
+		}
+	}
+	return result
+}