#include <linux/reboot.h>
#include <linux/delay.h>
#include <linux/proc_fs.h>
+#include <linux/sched.h>
#include <asm/uaccess.h>
#include <linux/sysrq.h>
#include <linux/timer.h>
#include <linux/time.h>
-#include <linux/lglock.h>
+/*#include <linux/lglock.h>*/
#include <linux/init.h>
#include <linux/idr.h>
#include <linux/namei.h>
MODULE_LICENSE("GPL");
MODULE_VERSION(VERSION_STR);
+struct proc_dir_entry *proc_entry;
+
static int address_in_root(unsigned int haddr) {
- //printk(KERN_CRIT "In address_in_root: %u",haddr);
struct net_device *dev;
struct net *net = &init_net;
static int inet_bind_entry(struct socket *sock, struct sockaddr *uaddr, int addr_len) {
struct sockaddr_in *addr = (struct sockaddr_in *)uaddr;
unsigned int snum = addr->sin_addr.s_addr;
+ //printk(KERN_CRIT "Checking address %d",snum);
if (address_in_root(snum)) {
put_net(sock_net(sock->sk));
sock_net_set(sock->sk, get_net(&init_net));
return 0;
}
+static struct file *do_last_probe(struct nameidata *nd, struct path *path,
+ const struct open_flags *op, const char *pathname) {
+
+
+ jprobe_return();
+
+}
static struct jprobe net_probe = {
.entry = (kprobe_opcode_t *) inet_bind_entry
printk("Transforward: Stopped transforward.\n");
}
+int once_only=0;
-
-static int __init transforward_init(void)
+static int init_probes(void)
{
int ret = 0;
printk("Transforward: starting transforward version %s.\n",
printk("register_jprobe failed, returned %u\n", ret);
return -1;
}
- //printk("Planted jprobe at %p, handler addr %p\n",
- net_probe.kp.addr, net_probe.entry);
return ret;
}
+/* as per http://www.tldp.org/LDP/lkmpg/2.4/html/c577.htm
+ the declaration of write in the file_operations struct reads:
+ ssize_t (*write) (struct file *, const char *, size_t, loff_t *);
+*/
+ssize_t procfile_write(struct file *file, const char *buffer, size_t count, loff_t *data) {
+ if (!once_only) {
+ once_only=1;
+ if (init_probes()==-1)
+ printk(KERN_CRIT "Could not install procprotect probes. Reload module to retry.");
+ else
+ printk(KERN_CRIT "Activated transforward module");
+ }
+ return count;
+}
+static const struct file_operations transforward_fops = {
+ .owner = THIS_MODULE,
+ .write = procfile_write
+};
+
+static int __init transforward_init(void)
+{
+ int ret = 0;
+ printk("Transforward: starting transforward version %s.\n",
+ VERSION_STR);
+
+ proc_entry = proc_create("transforward", 0644, NULL, &transforward_fops);
+ return ret;
+}
+
module_init(transforward_init);
module_exit(transforward_exit);