void ssh_interceptor_iface_uninit(SshInterceptor interceptor)
{
/* Clear interface table and release net_device references. */
ssh_interceptor_clear_ifaces(interceptor);
if (interceptor->nf->iface_notifiers_installed == FALSE)
return;
SSH_ASSERT(in_softirq());
local_bh_enable();
SSH_ASSERT(!in_softirq());
/* Unregister notifier callback */
unregister_netdevice_notifier(&interceptor->nf->notifier_netdev);
unregister_inetaddr_notifier(&interceptor->nf->notifier_inetaddr);
#ifdef SSH_LINUX_INTERCEPTOR_IPV6
unregister_inet6addr_notifier(&interceptor->nf->notifier_inet6addr);
#endif /* SSH_LINUX_INTERCEPTOR_IPV6 */
local_bh_disable();
/* Due to lack of proper locking in linux kernel notifier code,
the unregister_*_notifier functions might leave the notifier
blocks out of sync, resulting in that the kernel may call an
unregistered notifier function.
Sleep for a while to decrease the possibility of the bug causing
trouble (crash during module unloading). */
mdelay(500);
interceptor->nf->iface_notifiers_installed = FALSE;
}
/* Interceptor initialization. Called by init_module(). */
int ssh_interceptor_init(void)
{
int ret;
/* Print version info for log files */
printk(KERN_INFO "VPNClient built on " __DATE__ " " __TIME__ "\n");
ret = ssh_interceptor_init_kernel_services();
if (ret != 0)
{
goto error0;
}
SSH_ASSERT(ssh_interceptor_context != NULL);
ret = ssh_interceptor_hook_magic_init();
if (ret != 0)
{
goto error1;
}
ret = ssh_interceptor_init_engine(ssh_interceptor_context);
if (ret != 0)
{
goto error4;
}
ret = ssh_interceptor_init_external_interfaces(ssh_interceptor_context);
if (ret != 0)
{
goto error5;
}
return 0;
error5:
local_bh_disable();
ssh_interceptor_uninit_engine(ssh_interceptor_context);
local_bh_enable();
error4:
ssh_interceptor_clear_ifaces(ssh_interceptor_context);
error1:
local_bh_disable();
ssh_interceptor_uninit_kernel_services();
local_bh_enable();
error0:
return ret;
}
