Linux下服务端编程
发布时间：2010/5/14 11:29:59 来源：城市学习网 编辑：ziteng
#include
#include
#include
#include
#include
#include
#include
#define SERVER_PORT 20000
#define LEN_LISTEN_QUEUE 10
#define BUFFER_SIZE 255
#define WELCOME_MESSAGE "welcome to connect the server. "
int main(int argc, char **argv)
{
int server_sockfd, client_sockfd;
struct sockaddr_in server_addr;
struct sockaddr_in client_addr;
printf("the server program!\n");
if ((server_sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
{
printf("create socket error!\n");
exit(1);
}
bzero(&server_addr, sizeof(server_addr));
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(SERVER_PORT);
server_addr.sin_addr.s_addr = htons(INADDR_ANY);
if(bind(server_sockfd, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0)
{
printf("bind to port %d failure!\n", SERVER_PORT);
exit(1);
}
if(listen(server_sockfd, LEN_LISTEN_QUEUE) < 0)
{
printf("call listen failure!\n");
exit(1);
}
while(1)
{
char buf[BUFFER_SIZE];
long timestamp;
socklen_t length = sizeof(client_addr);
client_sockfd = accept(server_sockfd, (struct sockaddr *)&client_addr, &length);
if(client_sockfd < 0)
{
printf("error comes when call accept!\n");
break;
}
strcpy(buf, WELCOME_MESSAGE);
printf("from client,IP:%s,Port:%d\n", inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port));
timestamp = time(NULL);
strcat(buf, "timestamp in server:");
strcat(buf, ctime(& timestamp));
send(client_sockfd, buf, BUFFER_SIZE, 0);
close(client_sockfd);
}
close(server_sockfd);
return 0;
}
