您正在发送 SYN 并正确接收 SYN_ACK.此时，您应该根据您收到的 SYN_ACK 生成并发送一个 ACK​​，然后最终发送 HTTP GET 请求.看来你对TCP 3次握手机制有些困惑.简而言之，您不应该获得"ACK，您应该自己生成并发送.

You are sending a SYN and correctly receiving a SYN_ACK. At this point, you should generate and send an ACK based on the SYN_ACK that you've received, and THEN finally transmit the HTTP GET request. It seems that you are somewhat confused about the TCP 3-way handshake mechanism. In short, you are not supposed to 'get' an ACK, you are supposed to generate and send this yourself.