Add perIPTLSConn to support MaxConnsPerIP with tls connections

Otherwise calling RequestCtx.TLSConnectionState() will fail.

Fixes #1770

peripconn.go

@@ -1,14 +1,16 @@
 package fasthttp
 
 import (
+	"crypto/tls"
 	"net"
 	"sync"
 )
 
 type perIPConnCounter struct {
-	pool sync.Pool
-	lock sync.Mutex
-	m    map[uint32]int
+	perIPConnPool    sync.Pool
+	perIPTLSConnPool sync.Pool
+	lock             sync.Mutex
+	m                map[uint32]int
 }
 
 func (cc *perIPConnCounter) Register(ip uint32) int {
@@ -43,8 +45,30 @@ type perIPConn struct {
 	perIPConnCounter *perIPConnCounter
 }
 
-func acquirePerIPConn(conn net.Conn, ip uint32, counter *perIPConnCounter) *perIPConn {
-	v := counter.pool.Get()
+type perIPTLSConn struct {
+	*tls.Conn
+
+	ip               uint32
+	perIPConnCounter *perIPConnCounter
+}
+
+func acquirePerIPConn(conn net.Conn, ip uint32, counter *perIPConnCounter) net.Conn {
+	if tlcConn, ok := conn.(*tls.Conn); ok {
+		v := counter.perIPTLSConnPool.Get()
+		if v == nil {
+			return &perIPTLSConn{
+				perIPConnCounter: counter,
+				Conn:             tlcConn,
+				ip:               ip,
+			}
+		}
+		c := v.(*perIPConn)
+		c.Conn = conn
+		c.ip = ip
+		return c
+	}
+
+	v := counter.perIPConnPool.Get()
 	if v == nil {
 		return &perIPConn{
 			perIPConnCounter: counter,
@@ -58,15 +82,19 @@ func acquirePerIPConn(conn net.Conn, ip uint32, counter *perIPConnCounter) *perI
 	return c
 }
 
-func releasePerIPConn(c *perIPConn) {
+func (c *perIPConn) Close() error {
+	err := c.Conn.Close()
+	c.perIPConnCounter.Unregister(c.ip)
 	c.Conn = nil
-	c.perIPConnCounter.pool.Put(c)
+	c.perIPConnCounter.perIPConnPool.Put(c)
+	return err
 }
 
-func (c *perIPConn) Close() error {
+func (c *perIPTLSConn) Close() error {
 	err := c.Conn.Close()
 	c.perIPConnCounter.Unregister(c.ip)
-	releasePerIPConn(c)
+	c.Conn = nil
+	c.perIPConnCounter.perIPTLSConnPool.Put(c)
 	return err
 }
 

peripconn_test.go

@@ -4,6 +4,8 @@ import (
 	"testing"
 )
 
+var _ connTLSer = &perIPTLSConn{}
+
 func TestIPxUint32(t *testing.T) {
 	t.Parallel()