[Top] UNIX Network Programming series 05

Please download it and respect the labor achievements of the author (xiaobin!

 

In the first instance, we have compiled the client program. In this article, we will compile the server program.

 

Basically, the server-side program is not only the "Anti" program of the client program!

1. Establish socket communication

2. initialize servaddr

Set 2.1 to 0

2.2 set the protocol family

2.3 set port

2.4 set the IP address to all IP addresses of the Local Machine/any IP Address

3. Port bound to socket

4. Listen to socket

The above 2.4, 3, and 4 are prepared for the client's connect.

Loop execution:

5. Accept connections

6. Send data

7. Close the connection

The second running instance!

Daytimetcpsrv. c

 

#include "./lib/unp.h"#include <time.h>#define LISTEN_QUEUE 20int main(int argc, char **argv){  int     listenfd, connfd;  struct  sockaddr_in servaddr;  char    buff[MAXLINE];  time_t  ticks;    listenfd = socket(AF_INET, SOCK_STREAM, 0);    bzero(&servaddr, sizeof(servaddr));  servaddr.sin_family = AF_INET;  servaddr.sin_addr.s_addr = htonl(INADDR_ANY);  servaddr.sin_port = htons(13);    bind(listenfd, (struct sockaddr *) &servaddr, sizeof(servaddr));  listen(listenfd, LISTEN_QUEUE);    for ( ; ; ) {    connfd = accept(listenfd, (struct sockaddr *) NULL, NULL);        time(&ticks);    snprintf(buff, sizeof(buff), "%s\n", ctime(&ticks));        write(connfd, buff, strlen(buff));        close(connfd);  }}

 

 

Compile:

Root @ xiaobin-desktop:/home/xiaobin/temp # cc daytimetcpsrv. C-o daytime1.out

Run:

Root @ xiaobin-desktop:/home/xiaobin/temp #./daytime1.out

 

------------------------------------------------------------------------- End -------

Test:

Use Windows telnet to test whether our program runs normally,

Enter Telnet 192.168.101.128 13 in the command prompt

(192.168.101.128 is the Server IP address. 13 is the port number used in the above program)

If the content in the red box in the figure appears, it indicates that the server is running normally.