diff --git a/curl.go b/curl.go
index 3b37cb4..96d7502 100644
--- a/curl.go
+++ b/curl.go
@@ -22,6 +22,7 @@ const (
 	HEADER_FORM_URLENCODE = `application/x-www-form-urlencoded`
 	HEADER_FORM_DATA      = `multipart/form-data`
 	HEADER_JSON           = `application/json`
+	HEADER_PLAIN          = `text/plain`
 )
 
 type RequestFile struct {
diff --git a/ping.go b/ping.go
index efbd183..2fcb51e 100644
--- a/ping.go
+++ b/ping.go
@@ -33,6 +33,7 @@ func getICMP(seq uint16) ICMP {
 
 func sendICMPRequest(icmp ICMP, destAddr *net.IPAddr, timeout time.Duration) (PingResult, error) {
 	var res PingResult
+	res.RemoteIP = destAddr.String()
 	conn, err := net.DialIP("ip:icmp", nil, destAddr)
 	if err != nil {
 		return res, err
@@ -84,6 +85,7 @@ func checkSum(data []byte) uint16 {
 type PingResult struct {
 	Duration  time.Duration
 	RecvCount int
+	RemoteIP  string
 }
 
 func Ping(ip string, seq int, timeout time.Duration) (PingResult, error) {
@@ -95,3 +97,14 @@ func Ping(ip string, seq int, timeout time.Duration) (PingResult, error) {
 	icmp := getICMP(uint16(seq))
 	return sendICMPRequest(icmp, ipAddr, timeout)
 }
+
+func IsIpPingable(ip string, timeout time.Duration, retryLimit int) bool {
+	for i := 0; i < retryLimit; i++ {
+		_, err := Ping(ip, 29, timeout)
+		if err != nil {
+			continue
+		}
+		return true
+	}
+	return false
+}
diff --git a/ping_test.go b/ping_test.go
index 66ea297..f6376ab 100644
--- a/ping_test.go
+++ b/ping_test.go
@@ -7,5 +7,9 @@ import (
 )
 
 func Test_Ping(t *testing.T) {
-	fmt.Println(Ping("baidu.com", 0, time.Second*2))
+	fmt.Println(Ping("baidu.com", 29, time.Second*2))
+	fmt.Println(Ping("www.b612.me", 29, time.Second*2))
+	fmt.Println(IsIpPingable("baidu.com", time.Second*2, 3))
+	fmt.Println(IsIpPingable("www.b612.me", time.Second*2, 3))
+
 }