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|
#ifndef __KERNEL__
# define __KERNEL__
#endif
#ifndef MODULE
# define MODULE
#endif
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/proc_fs.h>
#include <linux/sched.h>
#include <asm/uaccess.h>
#include <linux/fs.h>
#include <linux/types.h>
#include <linux/slab.h> /* kmalloc() */
#include <asm/semaphore.h>
#include <linux/mm.h>
#include <linux/wrapper.h>
#include <linux/errno.h>
#include <asm/page.h>
#include <linux/config.h>
#define MODULE_VERSION "1.0"
#define MODULE_NAME "spying"
#define FOOBAR_LEN 256
static struct proc_dir_entry *virtual_file;
struct Memoire
{
char message[256][256];
};
struct Memoire pointeurDebut;
int messageRendu=0;
int start = 0;
int end=0;
int nbMessage=0;
static int proc_read_foobar(char *page, char **start,off_t off, int count,int *eof, void *data)
{
int len=0;
struct Memoire * bufferMemoire=(struct Memoire *)data;
MOD_INC_USE_COUNT;
int nbMessageEcrit = 0;
if( nbMessage > 255 )
{
messageRendu = nbMessage%256;
end = messageRendu-1;
}
else
{
messageRendu = 0;
}
printk("Message rendu avant print : %i",messageRendu);
printk("Message Count avant print : %i",count);
while(nbMessageEcrit< 256)
{
if( messageRendu > 255 )
{
messageRendu =0;
}
if( bufferMemoire->message[messageRendu][0] != '\0' )
{
len= sprintf(page,"\nMessage #%i : %s",messageRendu,bufferMemoire->message);
printk("Longeur : %i",len);
printk("\nMessage #%i : %s",messageRendu,bufferMemoire->message[messageRendu]);
int j=0;
while(j<256)
{
bufferMemoire->message[messageRendu][j] = '\0';
j++;
}
}
else
{
//break;
}
messageRendu++;
nbMessageEcrit++;
}
printk("Message Longeur : %i",len);
messageRendu=0;
nbMessage=0;
MOD_DEC_USE_COUNT;
return len;
}
static int proc_write_foobar(struct file *file,const char *buffer,unsigned long count,void *data)
{
struct Memoire * messageData=(struct Memoire *)data;
//struct fb_data_t *fb_data = (struct fb_data_t *)data;
MOD_INC_USE_COUNT;
unsigned long longeurMessage = count;
if( longeurMessage > 255 )
{
printk("<1>\nLe message a ete tronque au 256 caractere");
longeurMessage = 255;
}
if( nbMessage > 255 )
{
messageRendu = nbMessage%256;
}
printk("Message ecrit : %s \n",buffer);
printk("Message count : %i \n",count);
printk("Message nbMessage : %i \n",nbMessage);
printk("Message messageRendu : %i \n",messageRendu);
//printk("Adresse : %i \n",messageData->message[messageRendu]);
if(copy_from_user(&messageData->message[messageRendu], buffer, longeurMessage))
{
MOD_DEC_USE_COUNT;
return -EFAULT;
}
messageData->message[messageRendu][longeurMessage] = '\0';
end++;
messageRendu++;
nbMessage++;
MOD_DEC_USE_COUNT;
return longeurMessage;
}
static int __init init_procfs_example(void)
{
int rv = 0;
//
// virutal
//
virtual_file = create_proc_entry(MODULE_NAME, 0644, NULL);
printk("<1>vitual creer\n");
if(virtual_file == NULL)
{
return -ENOMEM;
}
virtual_file->data = &pointeurDebut;
virtual_file->read_proc = proc_read_foobar;
virtual_file->write_proc = proc_write_foobar;
virtual_file->owner = THIS_MODULE;
/* everything OK */
printk(KERN_INFO "%s %s initialised\n", MODULE_NAME, MODULE_VERSION);
messageRendu=0;
nbMessage=0;
return 0;
static void __exit cleanup_procfs_example(void)
{
remove_proc_entry(MODULE_NAME, NULL);
//remove_proc_entry(MODULE_NAME, NULL);
printk(KERN_INFO "%s %s removed\n", MODULE_NAME, MODULE_VERSION);
}
module_init(init_procfs_example);
module_exit(cleanup_procfs_example);
EXPORT_NO_SYMBOLS; |
