The LinCAN driver license unified according to DCE FEE CTU head and superiors request.

[lincan.git] / lincan / src / ioctl.c

diff --git a/lincan/src/ioctl.c b/lincan/src/ioctl.c
index 63aaea10188e1495f1024a8787c60d916d82b38a..2d410f19b531ffa4a1223719071049db70433135 100644 (file)
--- a/lincan/src/ioctl.c
+++ b/lincan/src/ioctl.c
@@ -1,17 +1,41 @@
-/* ioctl.c
- * Linux CAN-bus device driver.
- * Written by Arnaud Westenberg email:arnaud@wanadoo.nl
- * Rewritten for new CAN queues by Pavel Pisa - OCERA team member
- * email:pisa@cmp.felk.cvut.cz
- * This software is released under the GPL-License.
- * Version lincan-0.3  17 Jun 2004
- */
+/**************************************************************************/
+/* File: ioctl.c - CAN driver IOCTL functions support                     */
+/*                                                                        */
+/* LinCAN - (Not only) Linux CAN bus driver                               */
+/* Copyright (C) 2002-2009 DCE FEE CTU Prague <http://dce.felk.cvut.cz>   */
+/* Copyright (C) 2002-2009 Pavel Pisa <pisa@cmp.felk.cvut.cz>             */
+/* Funded by OCERA and FRESCOR IST projects                               */
+/* Based on CAN driver code by Arnaud Westenberg <arnaud@wanadoo.nl>      */
+/*                                                                        */
+/* LinCAN is free software; you can redistribute it and/or modify it      */
+/* under terms of the GNU General Public License as published by the      */
+/* Free Software Foundation; either version 2, or (at your option) any    */
+/* later version.  LinCAN is distributed in the hope that it will be      */
+/* useful, but WITHOUT ANY WARRANTY; without even the implied warranty    */
+/* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU    */
+/* General Public License for more details. You should have received a    */
+/* copy of the GNU General Public License along with LinCAN; see file     */
+/* COPYING. If not, write to the Free Software Foundation, 675 Mass Ave,  */
+/* Cambridge, MA 02139, USA.                                              */
+/*                                                                        */
+/* To allow use of LinCAN in the compact embedded systems firmware        */
+/* and RT-executives (RTEMS for example), main authors agree with next    */
+/* special exception:                                                     */
+/*                                                                        */
+/* Including LinCAN header files in a file, instantiating LinCAN generics */
+/* or templates, or linking other files with LinCAN objects to produce    */
+/* an application image/executable, does not by itself cause the          */
+/* resulting application image/executable to be covered by                */
+/* the GNU General Public License.                                        */
+/* This exception does not however invalidate any other reasons           */
+/* why the executable file might be covered by the GNU Public License.    */
+/* Publication of enhanced or derived LinCAN files is required although.  */
+/**************************************************************************/
 
 #include "../include/can.h"
 #include "../include/can_sysdep.h"
 #include "../include/main.h"
 #include "../include/ioctl.h"
-#include "../include/i82527.h"
 
 int can_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
 {
@@ -78,7 +102,9 @@ int can_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned
                
                case CANQUE_FILTER: {
                        struct canfilt_t canfilt;
-                       copy_from_user(&canfilt, (void*)arg, sizeof(struct canfilt_t));
+                       int ret;
+                       ret = copy_from_user(&canfilt, (void*)arg, sizeof(struct canfilt_t));
+                       if(ret) return -EFAULT;
                        if(canuser->rx_edge0){
                                canque_set_filt(canuser->rx_edge0, canfilt.id, canfilt.mask, canfilt.flags);
                        }
@@ -89,10 +115,13 @@ int can_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned
                        int ret;
                        struct canmsg_t rtr_msg;
                        
-                       copy_from_user(&rtr_msg, (void*)arg, sizeof(struct canmsg_t));
+                       ret = copy_from_user(&rtr_msg, (void*)arg, sizeof(struct canmsg_t));
+                       if(ret) return -EFAULT;
                        ret = can_ioctl_remote_read(canuser, &rtr_msg, rtr_msg.id, 0);
                        if(ret<0) return ret;
-                       copy_to_user((void*)arg, &rtr_msg, sizeof(struct canmsg_t));
+                       ret = copy_to_user((void*)arg, &rtr_msg, sizeof(struct canmsg_t));
+                       if(ret) return -EFAULT;
+                       break;
                }
 
                case CONF_BAUD: {
@@ -109,7 +138,11 @@ int can_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned
                
                case CONF_BAUDPARAMS: {
                        struct can_baudparams_t params;
-                       copy_from_user(&params, (void*)arg, sizeof(struct can_baudparams_t));
+                       int ret;
+                       
+                       ret = copy_from_user(&params, (void*)arg, sizeof(struct can_baudparams_t));
+                       if(ret) return -EFAULT;
+
                        if(params.flags == -1) params.flags = 0;
                        if(params.baudrate == -1) params.baudrate = chip->baudrate;
                        if(params.sjw == -1) params.sjw = 0;