hello,
Since yesterday I have been trying to make a kernel module
who use sockets. But I have got an error on my accept when
I made a telnet on localhost with the good port my computer
freeze :'(
this is my code :
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/net.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/byteorder/generic.h>
#include <asm-generic/fcntl.h>
#define NB_THREAD 1
#define SERVER_PORT 39237
struct socket *mysock = NULL;
struct socket *cli = NULL;
/*
** this function create the socket bind and make one accept
*/
static int createmysock(void *data)
{
struct sockaddr_in serv;
int error;
printk(KERN_INFO "I start the create socket\n");
error = sock_create(AF_INET, SOCK_STREAM, IPPROTO_TCP, &mysock);
if (error < 0)
{
printk(KERN_INFO "fail to make the socket\n");
return -1;
}
serv.sin_family = AF_INET;
serv.sin_addr.s_addr = INADDR_ANY;
serv.sin_port = htons((unsigned int) SERVER_PORT);
error = mysock->ops->bind(mysock, (struct sockaddr *)&serv,
sizeof(serv));
if ( error < 0)
{
printk(KERN_INFO "tu fait de la merde syl\n");
return -1;
}
printk(KERN_INFO "bind OK\n");
error = mysock->ops->listen(mysock, 1);
if ( error < 0)
{
printk(KERN_INFO "error\n");
return -1;
}
printk(KERN_INFO "listen OK\n");
cli = sock_create_lite(AF_INET, SOCK_STREAM, IPPROTO_TCP, &cli);
printk(KERN_INFO "bug?\n");
/*cli->ops = mysock->ops;*/ if i uncoment this line i have
got a kernel oops and i don t know why?
printk(KERN_INFO "bug2?\n");
error = mysock->ops->accept(mysock, cli, O_RDWR);
if ( error < 0)
{
printk(KERN_INFO "error\n");
return -1;
}
printk(KERN_INFO "Accept ok\n");
printk(KERN_INFO "Socket creer\n");
sock_release(cli);
return 0;
}
int init_module(void)
{
int i;
struct task_struct *myw;
printk(KERN_INFO "hello world\n");
for (i = 0; i < NB_THREAD; i++)
{
myw = kthread_create(createmysock, "yeah!!!!!!!!!!\n", "write");
wake_up_process(myw);
}
return 0;
}
void cleanup_module(void)
{
sock_release(mysock);
printk (KERN_INFO "Goodbye world\n");
return ;
}
could you help me?
thanks and sorry for my english
--
syl [at] ccna.syl [at] gmail.com
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