如果只想接收C / TCP中的数据，是否需要connect（）？

Question

if I want ONLY to receive data from a client, and not send data out, is it necessary have a connect() in the code of my server?

Or is it sufficient to have the following?

socket();
bind();
listen();
accept();

Answer 1

This describes the basic principle of server-client interaction. As you can see, the client must connect to the server before any interaction.

Once you've built a socket descriptor with the socket() call, you can connect that socket to a remote server using the well-named connect() system call.

Also the sequence you mentioned is in the server . If you want to only receive data from server, just do the read in client and write in server. But connect is neccessary.

Answer 2

You need to use socket and connect for the client.

The TCP protocol does send data to the server and recieves data back from the server (even if you are not transferring data) in the form of ACKs

Please read up on the TCP/IP protocol.

Answer 3

if I want ONLY to receive data from a client, and not send data out, is it necessary have a connect() in the code of my server?

It is never necessary to have connect() in the code of a server.

Clients call connect(). Servers call accept(). By definition.