/*
* This file define the new driver API for Wireless Extensions
*
- * Version : 7 18.3.05
+ * Version : 8 16.3.07
*
* Authors : Jean Tourrilhes - HPL - <jt@hpl.hp.com>
- * Copyright (c) 2001-2006 Jean Tourrilhes, All Rights Reserved.
+ * Copyright (c) 2001-2007 Jean Tourrilhes, All Rights Reserved.
*/
#ifndef _IW_HANDLER_H
* will be needed...
* I just plan to increment with each new version.
*/
-#define IW_HANDLER_VERSION 7
+#define IW_HANDLER_VERSION 8
/*
* Changes :
* - Remove (struct iw_point *)->pointer from events and streams
* - Remove spy_offset from struct iw_handler_def
* - Add "check" version of event macros for ieee802.11 stack
+ *
+ * V7 to V8
+ * ----------
+ * - Prevent leaking of kernel space in stream on 64 bits.
*/
/**************************** CONSTANTS ****************************/
#define EIWCOMMIT EINPROGRESS
/* Flags available in struct iw_request_info */
-#define IW_REQUEST_FLAG_NONE 0x0000 /* No flag so far */
+#define IW_REQUEST_FLAG_COMPAT 0x0001 /* Compat ioctl call */
/* Type of headers we know about (basically union iwreq_data) */
#define IW_HEADER_TYPE_NULL 0 /* Not available */
extern int dev_get_wireless_info(char * buffer, char **start, off_t offset,
int length);
-/* Handle IOCTLs, called in net/core/dev.c */
-extern int wireless_process_ioctl(struct ifreq *ifr, unsigned int cmd);
-
-/* Handle RtNetlink requests, called in net/core/rtnetlink.c */
-extern int wireless_rtnetlink_set(struct net_device * dev,
- char * data,
- int len);
-extern int wireless_rtnetlink_get(struct net_device * dev,
- char * data,
- int len,
- char ** p_buf,
- int * p_len);
-
/* Second : functions that may be called by driver modules */
/* Send a single event to user space */
* Function that are so simple that it's more efficient inlining them
*/
-/*------------------------------------------------------------------*/
-/*
- * Wrapper to add an Wireless Event to a stream of events.
- */
-static inline char *
-iwe_stream_add_event(char * stream, /* Stream of events */
- char * ends, /* End of stream */
- struct iw_event *iwe, /* Payload */
- int event_len) /* Real size of payload */
+static inline int iwe_stream_lcp_len(struct iw_request_info *info)
{
- /* Check if it's possible */
- if(likely((stream + event_len) < ends)) {
- iwe->len = event_len;
- memcpy(stream, (char *) iwe, event_len);
- stream += event_len;
- }
- return stream;
+#ifdef CONFIG_COMPAT
+ if (info->flags & IW_REQUEST_FLAG_COMPAT)
+ return IW_EV_COMPAT_LCP_LEN;
+#endif
+ return IW_EV_LCP_LEN;
}
-/*------------------------------------------------------------------*/
-/*
- * Wrapper to add an short Wireless Event containing a pointer to a
- * stream of events.
- */
-static inline char *
-iwe_stream_add_point(char * stream, /* Stream of events */
- char * ends, /* End of stream */
- struct iw_event *iwe, /* Payload length + flags */
- char * extra) /* More payload */
+static inline int iwe_stream_point_len(struct iw_request_info *info)
{
- int event_len = IW_EV_POINT_LEN + iwe->u.data.length;
- /* Check if it's possible */
- if(likely((stream + event_len) < ends)) {
- iwe->len = event_len;
- memcpy(stream, (char *) iwe, IW_EV_LCP_LEN);
- memcpy(stream + IW_EV_LCP_LEN,
- ((char *) iwe) + IW_EV_LCP_LEN + IW_EV_POINT_OFF,
- IW_EV_POINT_LEN - IW_EV_LCP_LEN);
- memcpy(stream + IW_EV_POINT_LEN, extra, iwe->u.data.length);
- stream += event_len;
- }
- return stream;
+#ifdef CONFIG_COMPAT
+ if (info->flags & IW_REQUEST_FLAG_COMPAT)
+ return IW_EV_COMPAT_POINT_LEN;
+#endif
+ return IW_EV_POINT_LEN;
}
-/*------------------------------------------------------------------*/
-/*
- * Wrapper to add a value to a Wireless Event in a stream of events.
- * Be careful, this one is tricky to use properly :
- * At the first run, you need to have (value = event + IW_EV_LCP_LEN).
- */
-static inline char *
-iwe_stream_add_value(char * event, /* Event in the stream */
- char * value, /* Value in event */
- char * ends, /* End of stream */
- struct iw_event *iwe, /* Payload */
- int event_len) /* Real size of payload */
+static inline int iwe_stream_event_len_adjust(struct iw_request_info *info,
+ int event_len)
{
- /* Don't duplicate LCP */
- event_len -= IW_EV_LCP_LEN;
-
- /* Check if it's possible */
- if(likely((value + event_len) < ends)) {
- /* Add new value */
- memcpy(value, (char *) iwe + IW_EV_LCP_LEN, event_len);
- value += event_len;
- /* Patch LCP */
- iwe->len = value - event;
- memcpy(event, (char *) iwe, IW_EV_LCP_LEN);
+#ifdef CONFIG_COMPAT
+ if (info->flags & IW_REQUEST_FLAG_COMPAT) {
+ event_len -= IW_EV_LCP_LEN;
+ event_len += IW_EV_COMPAT_LCP_LEN;
}
- return value;
+#endif
+
+ return event_len;
}
/*------------------------------------------------------------------*/
/*
* Wrapper to add an Wireless Event to a stream of events.
- * Same as above, with explicit error check...
*/
static inline char *
-iwe_stream_check_add_event(char * stream, /* Stream of events */
- char * ends, /* End of stream */
- struct iw_event *iwe, /* Payload */
- int event_len, /* Size of payload */
- int * perr) /* Error report */
+iwe_stream_add_event(struct iw_request_info *info, char *stream, char *ends,
+ struct iw_event *iwe, int event_len)
{
- /* Check if it's possible, set error if not */
+ int lcp_len = iwe_stream_lcp_len(info);
+
+ event_len = iwe_stream_event_len_adjust(info, event_len);
+
+ /* Check if it's possible */
if(likely((stream + event_len) < ends)) {
iwe->len = event_len;
- memcpy(stream, (char *) iwe, event_len);
+ /* Beware of alignement issues on 64 bits */
+ memcpy(stream, (char *) iwe, IW_EV_LCP_PK_LEN);
+ memcpy(stream + lcp_len, &iwe->u,
+ event_len - lcp_len);
stream += event_len;
- } else
- *perr = -E2BIG;
+ }
return stream;
}
/*
* Wrapper to add an short Wireless Event containing a pointer to a
* stream of events.
- * Same as above, with explicit error check...
*/
static inline char *
-iwe_stream_check_add_point(char * stream, /* Stream of events */
- char * ends, /* End of stream */
- struct iw_event *iwe, /* Payload length + flags */
- char * extra, /* More payload */
- int * perr) /* Error report */
+iwe_stream_add_point(struct iw_request_info *info, char *stream, char *ends,
+ struct iw_event *iwe, char *extra)
{
- int event_len = IW_EV_POINT_LEN + iwe->u.data.length;
+ int event_len = iwe_stream_point_len(info) + iwe->u.data.length;
+ int point_len = iwe_stream_point_len(info);
+ int lcp_len = iwe_stream_lcp_len(info);
+
/* Check if it's possible */
if(likely((stream + event_len) < ends)) {
iwe->len = event_len;
- memcpy(stream, (char *) iwe, IW_EV_LCP_LEN);
- memcpy(stream + IW_EV_LCP_LEN,
- ((char *) iwe) + IW_EV_LCP_LEN + IW_EV_POINT_OFF,
- IW_EV_POINT_LEN - IW_EV_LCP_LEN);
- memcpy(stream + IW_EV_POINT_LEN, extra, iwe->u.data.length);
+ memcpy(stream, (char *) iwe, IW_EV_LCP_PK_LEN);
+ memcpy(stream + lcp_len,
+ ((char *) &iwe->u) + IW_EV_POINT_OFF,
+ IW_EV_POINT_PK_LEN - IW_EV_LCP_PK_LEN);
+ memcpy(stream + point_len, extra, iwe->u.data.length);
stream += event_len;
- } else
- *perr = -E2BIG;
+ }
return stream;
}
* Wrapper to add a value to a Wireless Event in a stream of events.
* Be careful, this one is tricky to use properly :
* At the first run, you need to have (value = event + IW_EV_LCP_LEN).
- * Same as above, with explicit error check...
*/
static inline char *
-iwe_stream_check_add_value(char * event, /* Event in the stream */
- char * value, /* Value in event */
- char * ends, /* End of stream */
- struct iw_event *iwe, /* Payload */
- int event_len, /* Size of payload */
- int * perr) /* Error report */
+iwe_stream_add_value(struct iw_request_info *info, char *event, char *value,
+ char *ends, struct iw_event *iwe, int event_len)
{
+ int lcp_len = iwe_stream_lcp_len(info);
+
/* Don't duplicate LCP */
event_len -= IW_EV_LCP_LEN;
/* Check if it's possible */
if(likely((value + event_len) < ends)) {
/* Add new value */
- memcpy(value, (char *) iwe + IW_EV_LCP_LEN, event_len);
+ memcpy(value, &iwe->u, event_len);
value += event_len;
/* Patch LCP */
iwe->len = value - event;
- memcpy(event, (char *) iwe, IW_EV_LCP_LEN);
- } else
- *perr = -E2BIG;
+ memcpy(event, (char *) iwe, lcp_len);
+ }
return value;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff