Python Core (i)

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0x01 Socket First Family Af_unix

Address family: Addresses Family:unix file-based sockets

Type II Af_inet

Address family: Internet

Type III: Af_netlink (no connection type)

Allows the use of the BSD socket user interface for IPC between user-level and kernel-level code.

0X02 connection-oriented sockets and non-connected sockets

(1). Connection-oriented sockets.

Communication provides serialization, reliable, and non-repeatable data delivery. Information can be split into multiple fragments, and each socket is guaranteed to reach its destination. Implement this type of primary protocol: TCP.

(2). For non-connected sockets

Contrary to the nature of the connection-oriented sockets. Low cost. Udp.

0X03 socket () module function

Sockets (Socket_family, Socket_type, protocol=0)

　　

Create a TCP/IP socket

Tcpsock = Socket.socket (socket.af_inet, socket. SOCK_STREAM)

Create UDP/IP sockets

Udpsock = Socket.socket (socket.af_inet, socket. SOCK_STREAM)

Using the FROM socket import * allows you to introduce the socket attribute into the namespace, which shortens the code.

Tcosock = socket (af_inet, SOCK_STREAM)

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Python Core (i)