[ WiFi 智能家居项目 ] [ 8 ] WiFi TCP 编程
TCP client VS DUP client
| TCP | UDP | |
|---|---|---|
| socket type | SOCK_STREAM Provides sequenced, reliable, two-way, connection-based byte streams. An out-of-band data transmission mechanism may be supported. | SOCK_DGRAM Supports datagrams (connectionless, unreliable messages of a fixed maximum length). |
| connect() | √ | × |
TCP server VS UDP server
| TCP | UDP | |
|---|---|---|
| listen | √ listen() marks the socket referred to by sockfd as a passive socket, that is, as a socket that will be used to accept incoming connection requests using accept. | × |
| accept | √ 该函数不会阻塞，需借助 while 检查连接是否建立。连接建立后，返回新的文件描述符；传入地址是客户端地址。 | × |