Linux模块中使用socket网络通信 client部分

#include 

#include 
#include 


#include 
#include 
#include 
#include 

#define SERV_PORT 8080
#define MAXLINE 132
int __init sys_init(void)
{
	int retval;
	loff_t pos = 0;
	ssize_t ret;
	char buf[MAXLINE];
	struct socket *sock;
	struct file *file;
	struct sockaddr_in server;
	mm_segment_t old_fs;
	
	retval = sock_create(AF_INET, 1, 0, &sock);
	if(retval < 0)
		return retval;
		
	file = sock_alloc_file(sock, 1 & (O_CLOEXEC | O_NONBLOCK), NULL);
	if(IS_ERR(file))
		return PTR_ERR(file);
	
	memset(&server, 0, sizeof(server));
	server.sin_family = AF_INET;
	server.sin_port = htons(SERV_PORT);
	server.sin_addr.s_addr = 0x100007f;
	
	old_fs = get_fs();
	set_fs(get_ds());
	sock->ops->connect(sock, (struct sockaddr *)&server, sizeof(server), sock->file->f_flags);
	
	vfs_write(file, ".............", 13, &pos);
	pos = 0;
	ret = vfs_read(file, buf, MAXLINE, &pos);
	set_fs(old_fs);
	printk("%s", buf);
	filp_close(file, NULL);
    
    return retval;
}


void __exit sys_exit(void)
{
}
 
module_init(sys_init);
module_exit(sys_exit);
 
MODULE_LICENSE("GPL");