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[PATCH] WE-19 for kernel 2.6.13

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Hi Jeff,

	This is version 19 of the Wireless Extensions. It was supposed
to be the fallback of the WPA API changes, but people seem quite happy
about it (especially Jouni), so the patch is rather small.
	The patch has been fully tested with 2.6.13 and various
wireless drivers, and is in its final version. Would you mind pushing
that into Linus's kernel so that the driver and the apps can take
advantage ot it ?

	It includes :
	o iwstat improvement (explicit dBm). This is the result of
long discussions with Dan Williams, the authors of
NetworkManager. Thanks to him for all the fruitful feedback.
	o remove pointer from event stream. I was not totally sure if
this pointer was 32-64 bits clean, so I'd rather remove it and be at
peace with it.
	o remove linux header from wireless.h. This has long been
requested by people writting user space apps, now it's done, and it
was not even painful.
	o final deprecation of spy_offset. You did not like it, it's
now gone for good.
	o Start deprecating dev->get_wireless_stats -> debloat netdev
	o Add "check" version of event macros for ieee802.11
stack. Jiri Benc doesn't like the current macros, we aim to please ;-)
	All those changes, except the last one, have been bit-roting on
my web pages for a while...

	Patches for most kernel drivers will follow. Patches for the
Orinoco and the HostAP drivers have been sent to their respective
maintainers.

	Have fun...

	Jean
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Jean Tourrilhes 2005-09-02 11:32:28 -07:00 committed by Jeff Garzik
parent 054034dbf5
commit 6582c164f2
3 changed files with 175 additions and 53 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

47
include/linux/wireless.h
View File

@ -1,7 +1,7 @@
/*
* This file define a set of standard wireless extensions
*
* Version : 18 12.3.05
* Version : 19 18.3.05
*
* Authors : Jean Tourrilhes - HPL - <jt@hpl.hp.com>
* Copyright (c) 1997-2005 Jean Tourrilhes, All Rights Reserved.
@ -69,11 +69,12 @@
/***************************** INCLUDES *****************************/
/* To minimise problems in user space, I might remove those headers
* at some point. Jean II */
#include <linux/types.h> /* for "caddr_t" et al */
#include <linux/socket.h> /* for "struct sockaddr" et al */
#include <linux/if.h> /* for IFNAMSIZ and co... */
/* Do not put any header in this file, this creates a mess when
* exported to user space. Most users have included all the
* relevant headers anyway... Jean II */
/*#include <linux/types.h>*/ /* for "caddr_t" et al */
/*#include <linux/socket.h>*/ /* for "struct sockaddr" et al */
/*#include <linux/if.h>*/ /* for IFNAMSIZ and co... */
/***************************** VERSION *****************************/
/*
@ -82,7 +83,7 @@
* (there is some stuff that will be added in the future...)
* I just plan to increment with each new version.
*/
#define WIRELESS_EXT 18
#define WIRELESS_EXT 19
/*
* Changes :
@ -197,6 +198,15 @@
* related parameters (extensible up to 4096 parameter values)
* - Add wireless events: IWEVGENIE, IWEVMICHAELMICFAILURE,
* IWEVASSOCREQIE, IWEVASSOCRESPIE, IWEVPMKIDCAND
*
* V18 to V19
* ----------
* - Remove (struct iw_point *)->pointer from events and streams
* - Remove header includes to help user space
* - Increase IW_ENCODING_TOKEN_MAX from 32 to 64
* - Add IW_QUAL_ALL_UPDATED and IW_QUAL_ALL_INVALID macros
* - Add explicit flag to tell stats are in dBm : IW_QUAL_DBM
* - Add IW_IOCTL_IDX() and IW_EVENT_IDX() macros
*/
/**************************** CONSTANTS ****************************/
@ -322,6 +332,7 @@
/* The first and the last (range) */
#define SIOCIWFIRST 0x8B00
#define SIOCIWLAST SIOCIWLASTPRIV /* 0x8BFF */
#define IW_IOCTL_IDX(cmd) ((cmd) - SIOCIWFIRST)
/* Even : get (world access), odd : set (root access) */
#define IW_IS_SET(cmd) (!((cmd) & 0x1))
@ -366,6 +377,7 @@
* (struct iw_pmkid_cand) */
#define IWEVFIRST 0x8C00
#define IW_EVENT_IDX(cmd) ((cmd) - IWEVFIRST)
/* ------------------------- PRIVATE INFO ------------------------- */
/*
@ -427,12 +439,15 @@
#define IW_MODE_MONITOR 6 /* Passive monitor (listen only) */
/* Statistics flags (bitmask in updated) */
#define IW_QUAL_QUAL_UPDATED 0x1 /* Value was updated since last read */
#define IW_QUAL_LEVEL_UPDATED 0x2
#define IW_QUAL_NOISE_UPDATED 0x4
#define IW_QUAL_QUAL_UPDATED 0x01 /* Value was updated since last read */
#define IW_QUAL_LEVEL_UPDATED 0x02
#define IW_QUAL_NOISE_UPDATED 0x04
#define IW_QUAL_ALL_UPDATED 0x07
#define IW_QUAL_DBM 0x08 /* Level + Noise are dBm */
#define IW_QUAL_QUAL_INVALID 0x10 /* Driver doesn't provide value */
#define IW_QUAL_LEVEL_INVALID 0x20
#define IW_QUAL_NOISE_INVALID 0x40
#define IW_QUAL_ALL_INVALID 0x70
/* Frequency flags */
#define IW_FREQ_AUTO 0x00 /* Let the driver decides */
@ -443,7 +458,7 @@
#define IW_MAX_ENCODING_SIZES 8
/* Maximum size of the encoding token in bytes */
#define IW_ENCODING_TOKEN_MAX 32 /* 256 bits (for now) */
#define IW_ENCODING_TOKEN_MAX 64 /* 512 bits (for now) */
/* Flags for encoding (along with the token) */
#define IW_ENCODE_INDEX 0x00FF /* Token index (if needed) */
@ -1039,12 +1054,16 @@ struct iw_event
#define IW_EV_CHAR_LEN (IW_EV_LCP_LEN + IFNAMSIZ)
#define IW_EV_UINT_LEN (IW_EV_LCP_LEN + sizeof(__u32))
#define IW_EV_FREQ_LEN (IW_EV_LCP_LEN + sizeof(struct iw_freq))
#define IW_EV_POINT_LEN (IW_EV_LCP_LEN + sizeof(struct iw_point))
#define IW_EV_PARAM_LEN (IW_EV_LCP_LEN + sizeof(struct iw_param))
#define IW_EV_ADDR_LEN (IW_EV_LCP_LEN + sizeof(struct sockaddr))
#define IW_EV_QUAL_LEN (IW_EV_LCP_LEN + sizeof(struct iw_quality))
/* Note : in the case of iw_point, the extra data will come at the
* end of the event */
/* iw_point events are special. First, the payload (extra data) come at
* the end of the event, so they are bigger than IW_EV_POINT_LEN. Second,
* we omit the pointer, so start at an offset. */
#define IW_EV_POINT_OFF (((char *) &(((struct iw_point *) NULL)->length)) - \
(char *) NULL)
#define IW_EV_POINT_LEN (IW_EV_LCP_LEN + sizeof(struct iw_point) - \
IW_EV_POINT_OFF)
#endif /* _LINUX_WIRELESS_H */

123
include/net/iw_handler.h
View File

@ -1,10 +1,10 @@
/*
* This file define the new driver API for Wireless Extensions
*
* Version : 6 21.6.04
* Version : 7 18.3.05
*
* Authors : Jean Tourrilhes - HPL - <jt@hpl.hp.com>
* Copyright (c) 2001-2004 Jean Tourrilhes, All Rights Reserved.
* Copyright (c) 2001-2005 Jean Tourrilhes, All Rights Reserved.
*/
#ifndef _IW_HANDLER_H
@ -207,7 +207,7 @@
* will be needed...
* I just plan to increment with each new version.
*/
#define IW_HANDLER_VERSION 6
#define IW_HANDLER_VERSION 7
/*
* Changes :
@ -232,6 +232,13 @@
* - Remove spy #ifdef, they are always on -> cleaner code
* - Add IW_DESCR_FLAG_NOMAX flag for very large requests
* - Start migrating get_wireless_stats to struct iw_handler_def
*
* V6 to V7
* --------
* - Add struct ieee80211_device pointer in struct iw_public_data
* - 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
*/
/**************************** CONSTANTS ****************************/
@ -334,9 +341,6 @@ struct iw_handler_def
* We will automatically export that to user space... */
const struct iw_priv_args * private_args;
/* This field will be *removed* in the next version of WE */
long spy_offset; /* DO NOT USE */
/* New location of get_wireless_stats, to de-bloat struct net_device.
* The old pointer in struct net_device will be gradually phased
* out, and drivers are encouraged to use this one... */
@ -400,16 +404,21 @@ struct iw_spy_data
/* --------------------- DEVICE WIRELESS DATA --------------------- */
/*
* This is all the wireless data specific to a device instance that
* is managed by the core of Wireless Extensions.
* is managed by the core of Wireless Extensions or the 802.11 layer.
* We only keep pointer to those structures, so that a driver is free
* to share them between instances.
* This structure should be initialised before registering the device.
* Access to this data follow the same rules as any other struct net_device
* data (i.e. valid as long as struct net_device exist, same locking rules).
*/
/* Forward declaration */
struct ieee80211_device;
/* The struct */
struct iw_public_data {
/* Driver enhanced spy support */
struct iw_spy_data * spy_data;
struct iw_spy_data * spy_data;
/* Structure managed by the in-kernel IEEE 802.11 layer */
struct ieee80211_device * ieee80211;
};
/**************************** PROTOTYPES ****************************/
@ -424,7 +433,7 @@ struct iw_public_data {
extern int dev_get_wireless_info(char * buffer, char **start, off_t offset,
int length);
/* Handle IOCTLs, called in net/code/dev.c */
/* Handle IOCTLs, called in net/core/dev.c */
extern int wireless_process_ioctl(struct ifreq *ifr, unsigned int cmd);
/* Second : functions that may be called by driver modules */
@ -479,7 +488,7 @@ iwe_stream_add_event(char * stream, /* Stream of events */
int event_len) /* Real size of payload */
{
/* Check if it's possible */
if((stream + event_len) < ends) {
if(likely((stream + event_len) < ends)) {
iwe->len = event_len;
memcpy(stream, (char *) iwe, event_len);
stream += event_len;
@ -495,14 +504,17 @@ iwe_stream_add_event(char * stream, /* 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 */
char * extra)
struct iw_event *iwe, /* Payload length + flags */
char * extra) /* More payload */
{
int event_len = IW_EV_POINT_LEN + iwe->u.data.length;
/* Check if it's possible */
if((stream + event_len) < ends) {
if(likely((stream + event_len) < ends)) {
iwe->len = event_len;
memcpy(stream, (char *) iwe, IW_EV_POINT_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;
}
@ -526,7 +538,7 @@ iwe_stream_add_value(char * event, /* Event in the stream */
event_len -= IW_EV_LCP_LEN;
/* Check if it's possible */
if((value + event_len) < ends) {
if(likely((value + event_len) < ends)) {
/* Add new value */
memcpy(value, (char *) iwe + IW_EV_LCP_LEN, event_len);
value += event_len;
@ -537,4 +549,85 @@ iwe_stream_add_value(char * event, /* Event in the stream */
return value;
}
/*------------------------------------------------------------------*/
/*
* 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 */
{
/* Check if it's possible, set error if not */
if(likely((stream + event_len) < ends)) {
iwe->len = event_len;
memcpy(stream, (char *) iwe, event_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 */
{
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;
} 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 */
{
/* 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);
} else
*perr = -E2BIG;
return value;
}
#endif /* _IW_HANDLER_H */

58
net/core/wireless.c
View File

@ -58,6 +58,13 @@
* o Add wmb() in iw_handler_set_spy() for non-coherent archs/cpus
* Based on patch from Pavel Roskin <proski@gnu.org> :
* o Fix kernel data leak to user space in private handler handling
*
* v7 - 18.3.05 - Jean II
* o Remove (struct iw_point *)->pointer from events and streams
* o Remove spy_offset from struct iw_handler_def
* o Start deprecating dev->get_wireless_stats, output a warning
* o If IW_QUAL_DBM is set, show dBm values in /proc/net/wireless
* o Don't loose INVALID/DBM flags when clearing UPDATED flags (iwstats)
*/
/***************************** INCLUDES *****************************/
@ -446,10 +453,14 @@ static inline struct iw_statistics *get_wireless_stats(struct net_device *dev)
(dev->wireless_handlers->get_wireless_stats != NULL))
return dev->wireless_handlers->get_wireless_stats(dev);
/* Old location, will be phased out in next WE */
return (dev->get_wireless_stats ?
dev->get_wireless_stats(dev) :
(struct iw_statistics *) NULL);
/* Old location, field to be removed in next WE */
if(dev->get_wireless_stats) {
printk(KERN_DEBUG "%s (WE) : Driver using old /proc/net/wireless support, please fix driver !\n",
dev->name);
return dev->get_wireless_stats(dev);
}
/* Not found */
return (struct iw_statistics *) NULL;
}
/* ---------------------------------------------------------------- */
@ -541,16 +552,18 @@ static __inline__ void wireless_seq_printf_stats(struct seq_file *seq,
dev->name, stats->status, stats->qual.qual,
stats->qual.updated & IW_QUAL_QUAL_UPDATED
? '.' : ' ',
((__u8) stats->qual.level),
((__s32) stats->qual.level) -
((stats->qual.updated & IW_QUAL_DBM) ? 0x100 : 0),
stats->qual.updated & IW_QUAL_LEVEL_UPDATED
? '.' : ' ',
((__u8) stats->qual.noise),
((__s32) stats->qual.noise) -
((stats->qual.updated & IW_QUAL_DBM) ? 0x100 : 0),
stats->qual.updated & IW_QUAL_NOISE_UPDATED
? '.' : ' ',
stats->discard.nwid, stats->discard.code,
stats->discard.fragment, stats->discard.retries,
stats->discard.misc, stats->miss.beacon);
stats->qual.updated = 0;
stats->qual.updated &= ~IW_QUAL_ALL_UPDATED;
}
}
@ -593,6 +606,7 @@ static struct file_operations wireless_seq_fops = {
int __init wireless_proc_init(void)
{
/* Create /proc/net/wireless entry */
if (!proc_net_fops_create("wireless", S_IRUGO, &wireless_seq_fops))
return -ENOMEM;
@ -627,9 +641,9 @@ static inline int dev_iwstats(struct net_device *dev, struct ifreq *ifr)
sizeof(struct iw_statistics)))
return -EFAULT;
/* Check if we need to clear the update flag */
/* Check if we need to clear the updated flag */
if(wrq->u.data.flags != 0)
stats->qual.updated = 0;
stats->qual.updated &= ~IW_QUAL_ALL_UPDATED;
return 0;
} else
return -EOPNOTSUPP;
@ -1161,10 +1175,11 @@ void wireless_send_event(struct net_device * dev,
struct iw_event *event; /* Mallocated whole event */
int event_len; /* Its size */
int hdr_len; /* Size of the event header */
int wrqu_off = 0; /* Offset in wrqu */
/* Don't "optimise" the following variable, it will crash */
unsigned cmd_index; /* *MUST* be unsigned */
/* Get the description of the IOCTL */
/* Get the description of the Event */
if(cmd <= SIOCIWLAST) {
cmd_index = cmd - SIOCIWFIRST;
if(cmd_index < standard_ioctl_num)
@ -1207,6 +1222,8 @@ void wireless_send_event(struct net_device * dev,
/* Calculate extra_len - extra is NULL for restricted events */
if(extra != NULL)
extra_len = wrqu->data.length * descr->token_size;
/* Always at an offset in wrqu */
wrqu_off = IW_EV_POINT_OFF;
#ifdef WE_EVENT_DEBUG
printk(KERN_DEBUG "%s (WE) : Event 0x%04X, tokens %d, extra_len %d\n", dev->name, cmd, wrqu->data.length, extra_len);
#endif /* WE_EVENT_DEBUG */
@ -1217,7 +1234,7 @@ void wireless_send_event(struct net_device * dev,
event_len = hdr_len + extra_len;
#ifdef WE_EVENT_DEBUG
printk(KERN_DEBUG "%s (WE) : Event 0x%04X, hdr_len %d, event_len %d\n", dev->name, cmd, hdr_len, event_len);
printk(KERN_DEBUG "%s (WE) : Event 0x%04X, hdr_len %d, wrqu_off %d, event_len %d\n", dev->name, cmd, hdr_len, wrqu_off, event_len);
#endif /* WE_EVENT_DEBUG */
/* Create temporary buffer to hold the event */
@ -1228,7 +1245,7 @@ void wireless_send_event(struct net_device * dev,
/* Fill event */
event->len = event_len;
event->cmd = cmd;
memcpy(&event->u, wrqu, hdr_len - IW_EV_LCP_LEN);
memcpy(&event->u, ((char *) wrqu) + wrqu_off, hdr_len - IW_EV_LCP_LEN);
if(extra != NULL)
memcpy(((char *) event) + hdr_len, extra, extra_len);
@ -1249,7 +1266,7 @@ void wireless_send_event(struct net_device * dev,
* Now, the driver can delegate this task to Wireless Extensions.
* It needs to use those standard spy iw_handler in struct iw_handler_def,
* push data to us via wireless_spy_update() and include struct iw_spy_data
* in its private part (and advertise it in iw_handler_def->spy_offset).
* in its private part (and export it in net_device->wireless_data->spy_data).
* One of the main advantage of centralising spy support here is that
* it becomes much easier to improve and extend it without having to touch
* the drivers. One example is the addition of the Spy-Threshold events.
@ -1266,10 +1283,7 @@ static inline struct iw_spy_data * get_spydata(struct net_device *dev)
/* This is the new way */
if(dev->wireless_data)
return(dev->wireless_data->spy_data);
/* This is the old way. Doesn't work for multi-headed drivers.
* It will be removed in the next version of WE. */
return (dev->priv + dev->wireless_handlers->spy_offset);
return NULL;
}
/*------------------------------------------------------------------*/
@ -1284,10 +1298,6 @@ int iw_handler_set_spy(struct net_device * dev,
struct iw_spy_data * spydata = get_spydata(dev);
struct sockaddr * address = (struct sockaddr *) extra;
if(!dev->wireless_data)
/* Help user know that driver needs updating */
printk(KERN_DEBUG "%s (WE) : Driver using old/buggy spy support, please fix driver !\n",
dev->name);
/* Make sure driver is not buggy or using the old API */
if(!spydata)
return -EOPNOTSUPP;
@ -1318,7 +1328,7 @@ int iw_handler_set_spy(struct net_device * dev,
sizeof(struct iw_quality) * IW_MAX_SPY);
#ifdef WE_SPY_DEBUG
printk(KERN_DEBUG "iw_handler_set_spy() : offset %ld, spydata %p, num %d\n", dev->wireless_handlers->spy_offset, spydata, wrqu->data.length);
printk(KERN_DEBUG "iw_handler_set_spy() : wireless_data %p, spydata %p, num %d\n", dev->wireless_data, spydata, wrqu->data.length);
for (i = 0; i < wrqu->data.length; i++)
printk(KERN_DEBUG
"%02X:%02X:%02X:%02X:%02X:%02X \n",
@ -1371,7 +1381,7 @@ int iw_handler_get_spy(struct net_device * dev,
sizeof(struct iw_quality) * spydata->spy_number);
/* Reset updated flags. */
for(i = 0; i < spydata->spy_number; i++)
spydata->spy_stat[i].updated = 0;
spydata->spy_stat[i].updated &= ~IW_QUAL_ALL_UPDATED;
return 0;
}
@ -1486,7 +1496,7 @@ void wireless_spy_update(struct net_device * dev,
return;
#ifdef WE_SPY_DEBUG
printk(KERN_DEBUG "wireless_spy_update() : offset %ld, spydata %p, address %02X:%02X:%02X:%02X:%02X:%02X\n", dev->wireless_handlers->spy_offset, spydata, address[0], address[1], address[2], address[3], address[4], address[5]);
printk(KERN_DEBUG "wireless_spy_update() : wireless_data %p, spydata %p, address %02X:%02X:%02X:%02X:%02X:%02X\n", dev->wireless_data, spydata, address[0], address[1], address[2], address[3], address[4], address[5]);
#endif /* WE_SPY_DEBUG */
/* Update all records that match */