server.c

socket, server.c and client.c

/****************************************************************
 * $ID: server.c        三, 26  3月 2008 15:36:59 +0800  root $ *
 *                                                              *
 * Description:                                                 *
 *                                                              *
 * Maintainer:  范美辉(Meihui Fan)  <[e-mail]>            *
 *                                                              *
 * Copyright (C)  2008  HHTech                                  *
 *   www.hhcn.com, www.hhcn.org                                 *
 *   All rights reserved.                                       *
 *                                                              *
 * This file is free software;                                  *
 *   you are free to modify and/or redistribute it   	        *
 *   under the terms of the GNU General Public Licence (GPL).   *
 *                                                              *
 * Last modified: 三, 26  3月 2008 17:00:53 +0800       by root #
 ****************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>

#define PORT	4000
#define BACKLOG	10

int main(int argc, char *argv[])
{
    int sock_fd, new_fd;
    int sin_size;
    struct sockaddr_in server_addr, client_addr;
    char welcome[50];
    int opt = 1;
    int len = sizeof(opt);
    char buf[100];

    if((sock_fd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
    {
	perror("socket");
	exit(1);
    }

    setsockopt(sock_fd, SOL_SOCKET, SO_REUSEADDR, &opt, &len);

    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(PORT);
    server_addr.sin_addr.s_addr = INADDR_ANY;
    bzero(&(server_addr.sin_zero), 8);
    if(bind(sock_fd, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1)
    {
	perror("bind");
	close(sock_fd);
	exit(1);
    }
    if(listen(sock_fd, BACKLOG) == -1)
    {
	perror("listen");
	close(sock_fd);
	exit(1);
    }
    while(1)
    {
	sin_size = sizeof(struct sockaddr_in);
	if((new_fd = accept(sock_fd, (struct sockaddr *)&client_addr, &sin_size)) == -1)
	{
	    perror("accept");
	    continue;
	}
	printf("server got connection from %s\n", inet_ntoa(client_addr.sin_addr));
	snprintf(&welcome[0], 50, "Welcome connect to %s测试\n", inet_ntoa(server_addr.sin_addr));
	send(new_fd, &welcome[0], 50, 0);

	while(1)
	{
	    recv(new_fd, &buf[0], 100, 0);
	    printf("receive => %s\n", &buf[0]);
	    printf("send => ");
	    while((fgets(&buf[0], 100, stdin)) == NULL);
	    send(new_fd, &buf[0], 100, 0);
	}
	
	close(sock_fd);
	return 0;
    }
}

/******************** End Of File: server.c ********************/
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