Shulou(Shulou.com)06/01 Report--

TCP protocol is a protocol applied in the transport layer. Is a connection-oriented, reliable protocol.

Characteristics of TCP protocol:

1) oriented to byte stream.

2) TCP is a connection-oriented transport layer protocol

3) each TCP link can only have two endpoints

4) TCP provides reliable delivery of services

5) TCP provides full-duplex communication

According to the TCP protocol three-way handshake, server has been in the monitoring state, and so on to receive the client request connection (connect) signal, accept the connection.

Server: 1 # include 2 # include 3 # include 4 # include 5 # include 6 # include 7 # include 8 # include 9 # define _ BACKLOG 5 10 void usage (char * _ proc) 11 {12 printf ("usage:% s, [ip], [proc]", _ proc); 13} 14 int startup (const char * ip,const int port) 15 {16 int sock = socket (AF_INET,SOCK_STREAM,0) / / create socket 17 if (sock < 0) 18 {19 perror ("socket"); 20 exit (1); 21} 22 struct sockaddr_in local; 23 local.sin_family = AF_INET; 24 local.sin_port = htons (port); 25 local.sin_addr.s_addr = inet_addr (ip); 26 if (sock, (struct sockaddr*) & local,sizeof (local))

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