golang编写ping失败，求大神指点

环境是在windows7下的LiteIDE集成环境，代码如下： ```go package main import ( "bytes" "encoding/binary" "fmt" "net" ) type ICMP struct { Type uint8 Code uint8 Checksum uint16 Identifier uint16 SequenceNum uint16 } func CheckSum(data []byte) uint16 { var ( sum uint32 length int = len(data) index int ) for length > 1 { sum += uint32(data[index])<<8 + uint32(data[index+1]) index += 2 length -= 2 } if length > 0 { sum += uint32(data[index]) } sum += (sum >> 16) return uint16(^sum) } func main() { var ( icmp ICMP laddr net.IPAddr = net.IPAddr{IP: net.ParseIP("192.168.31.11")} raddr net.IPAddr = net.IPAddr{IP: net.ParseIP("192.168.31.1")} ) //如果你要使用网络层的其他协议还可以设置成 ip:ospf、ip:arp 等 conn, err := net.DialIP("ip4:icmp", &laddr, &raddr) if err != nil { fmt.Println(err.Error()) return } defer conn.Close() //开始填充数据包 icmp.Type = 8 //8->echo message 0->reply message icmp.Code = 0 icmp.Checksum = 0 icmp.Identifier = 0 icmp.SequenceNum = 0 var ( buffer bytes.Buffer ) //先在buffer中写入icmp数据报求去校验和 binary.Write(&buffer, binary.BigEndian, icmp) icmp.Checksum = CheckSum(buffer.Bytes()) //然后清空buffer并把求完校验和的icmp数据报写入其中准备发送 buffer.Reset() binary.Write(&buffer, binary.BigEndian, icmp) if _, err := conn.Write(buffer.Bytes()); err != nil { fmt.Println(err.Error()) return } fmt.Printf("send icmp packet success!") } ``` 运行提示： socket: An attempt was made to access a socket in a way forbidden by its access permissions. 求指点调通~