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tcp_server.c:
#include <stdio.h>
#include <sys/socket.h>
#include <unistd.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <time.h>
#define SERVER_PORT 20000
#define LENGTH_OF_LISTEN_QUEUE 10
#define BUFFER_SIZE 255
#define WELCOME_MESSAGE "welcome to connect the server"
int main(int argc, char **argv)
{
int servfd,clifd;
struct sockaddr_in servaddr,cliaddr;
if((servfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
{
printf("create socket error!\n");
exit(1);
}
bzero(&servaddr, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(SERVER_PORT);
servaddr.sin_addr.s_addr = htons(INADDR_ANY);
if(bind(servfd,(struct sockaddr*)&servaddr,sizeof(servaddr)) < 0)
{
printf ("bind to port %d failure!\n",SERVER_PORT);
exit(1);
}
if(listen(servfd, LENGTH_OF_LISTEN_QUEUE) < 0)
{
printf("call listen failure!\n");
exit(1);
}
while(1)
{
char buf[BUFFER_SIZE];
long timestamp;
socklen_t length = sizeof(cliaddr);
clifd = accept(servfd, (struct sockaddr*)&cliaddr, &length);
if(clifd < 0)
{
printf("error comes when call accept!\n");
break;
}
strcpy(buf,WELCOME_MESSAGE);
printf("from client, IP:%s, Port:%d\n", inet_ntoa(cliaddr.sin_addr), ntohs(cliaddr.sin_port));
timestamp = time(NULL);
strcat(buf, "timestamp in server:");
strcat(buf, ctime(×tamp));
send(clifd, buf, BUFFER_SIZE, 0);
close(clifd);
}
close(servfd);
return 0;
}
tcp_clie
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