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[WIRELESS]: Remove wext over netlink. 

As scheduled, this patch removes the pointless wext over netlink code.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Johannes Berg 2007-04-23 12:20:55 -07:00 committed by David S. Miller
parent 704232c271
commit 9e101eab15
5 changed files with 0 additions and 798 deletions
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12
Documentation/feature-removal-schedule.txt
View File

@ -285,18 +285,6 @@ Who: Richard Purdie <rpurdie@rpsys.net>
--------------------------- ---------------------------
What: Wireless extensions over netlink (CONFIG_NET_WIRELESS_RTNETLINK)
When: with the merge of wireless-dev, 2.6.22 or later
Why: The option/code is
* not enabled on most kernels
* not required by any userspace tools (except an experimental one,
and even there only for some parts, others use ioctl)
* pointless since wext is no longer evolving and the ioctl
interface needs to be kept
Who: Johannes Berg <johannes@sipsolutions.net>
---------------------------
What: i8xx_tco watchdog driver What: i8xx_tco watchdog driver
When: in 2.6.22 When: in 2.6.22
Why: the i8xx_tco watchdog driver has been replaced by the iTCO_wdt Why: the i8xx_tco watchdog driver has been replaced by the iTCO_wdt

10
include/net/iw_handler.h
View File

@ -440,16 +440,6 @@ extern int dev_get_wireless_info(char * buffer, char **start, off_t offset,
/* Handle IOCTLs, called in net/core/dev.c */ /* Handle IOCTLs, called in net/core/dev.c */
extern int wireless_process_ioctl(struct ifreq *ifr, unsigned int cmd); 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 */ /* Second : functions that may be called by driver modules */
/* Send a single event to user space */ /* Send a single event to user space */

31
net/core/rtnetlink.c
View File

@ -51,10 +51,6 @@
#include <net/pkt_sched.h> #include <net/pkt_sched.h>
#include <net/fib_rules.h> #include <net/fib_rules.h>
#include <net/rtnetlink.h> #include <net/rtnetlink.h>
#ifdef CONFIG_NET_WIRELESS_RTNETLINK
#include <linux/wireless.h>
#include <net/iw_handler.h>
#endif /* CONFIG_NET_WIRELESS_RTNETLINK */
struct rtnl_link struct rtnl_link
{ {
@ -684,17 +680,6 @@ static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
modified = 1; modified = 1;
} }
#ifdef CONFIG_NET_WIRELESS_RTNETLINK
if (tb[IFLA_WIRELESS]) {
/* Call Wireless Extensions.
* Various stuff checked in there... */
err = wireless_rtnetlink_set(dev, nla_data(tb[IFLA_WIRELESS]),
nla_len(tb[IFLA_WIRELESS]));
if (err < 0)
goto errout_dev;
}
#endif /* CONFIG_NET_WIRELESS_RTNETLINK */
if (tb[IFLA_BROADCAST]) { if (tb[IFLA_BROADCAST]) {
nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
send_addr_notify = 1; send_addr_notify = 1;
@ -758,22 +743,6 @@ static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
} else } else
return -EINVAL; return -EINVAL;
#ifdef CONFIG_NET_WIRELESS_RTNETLINK
if (tb[IFLA_WIRELESS]) {
/* Call Wireless Extensions. We need to know the size before
* we can alloc. Various stuff checked in there... */
err = wireless_rtnetlink_get(dev, nla_data(tb[IFLA_WIRELESS]),
nla_len(tb[IFLA_WIRELESS]),
&iw_buf, &iw_buf_len);
if (err < 0)
goto errout;
/* Payload is at an offset in buffer */
iw = iw_buf + IW_EV_POINT_OFF;
}
#endif /* CONFIG_NET_WIRELESS_RTNETLINK */
nskb = nlmsg_new(if_nlmsg_size(iw_buf_len), GFP_KERNEL); nskb = nlmsg_new(if_nlmsg_size(iw_buf_len), GFP_KERNEL);
if (nskb == NULL) { if (nskb == NULL) {
err = -ENOBUFS; err = -ENOBUFS;

735
net/core/wireless.c
View File

@ -104,12 +104,10 @@
/* Debugging stuff */ /* Debugging stuff */
#undef WE_IOCTL_DEBUG /* Debug IOCTL API */ #undef WE_IOCTL_DEBUG /* Debug IOCTL API */
#undef WE_RTNETLINK_DEBUG /* Debug RtNetlink API */
#undef WE_EVENT_DEBUG /* Debug Event dispatcher */ #undef WE_EVENT_DEBUG /* Debug Event dispatcher */
#undef WE_SPY_DEBUG /* Debug enhanced spy support */ #undef WE_SPY_DEBUG /* Debug enhanced spy support */
/* Options */ /* Options */
//CONFIG_NET_WIRELESS_RTNETLINK /* Wireless requests over RtNetlink */
#define WE_EVENT_RTNETLINK /* Propagate events using RtNetlink */ #define WE_EVENT_RTNETLINK /* Propagate events using RtNetlink */
#define WE_SET_EVENT /* Generate an event on some set commands */ #define WE_SET_EVENT /* Generate an event on some set commands */
@ -1145,739 +1143,6 @@ int wireless_process_ioctl(struct ifreq *ifr, unsigned int cmd)
return -EINVAL; return -EINVAL;
} }
/********************** RTNETLINK REQUEST API **********************/
/*
* The alternate user space API to configure all those Wireless Extensions
* is through RtNetlink.
* This API support only the new driver API (iw_handler).
*
* This RtNetlink API use the same query/reply model as the ioctl API.
* Maximum effort has been done to fit in the RtNetlink model, and
* we support both RtNetlink Set and RtNelink Get operations.
* On the other hand, we don't offer Dump operations because of the
* following reasons :
* o Large number of parameters, most optional
* o Large size of some parameters (> 100 bytes)
* o Each parameters need to be extracted from hardware
* o Scan requests can take seconds and disable network activity.
* Because of this high cost/overhead, we want to return only the
* parameters the user application is really interested in.
* We could offer partial Dump using the IW_DESCR_FLAG_DUMP flag.
*
* The API uses the standard RtNetlink socket. When the RtNetlink code
* find a IFLA_WIRELESS field in a RtNetlink SET_LINK request,
* it calls here.
*/
#ifdef CONFIG_NET_WIRELESS_RTNETLINK
/* ---------------------------------------------------------------- */
/*
* Wrapper to call a standard Wireless Extension GET handler.
* We do various checks and call the handler with the proper args.
*/
static int rtnetlink_standard_get(struct net_device * dev,
struct iw_event * request,
int request_len,
iw_handler handler,
char ** p_buf,
int * p_len)
{
const struct iw_ioctl_description * descr = NULL;
unsigned int cmd;
union iwreq_data * wrqu;
int hdr_len;
struct iw_request_info info;
char * buffer = NULL;
int buffer_size = 0;
int ret = -EINVAL;
/* Get the description of the Request */
cmd = request->cmd;
if ((cmd - SIOCIWFIRST) >= standard_ioctl_num)
return -EOPNOTSUPP;
descr = &(standard_ioctl[cmd - SIOCIWFIRST]);
#ifdef WE_RTNETLINK_DEBUG
printk(KERN_DEBUG "%s (WE.r) : Found standard handler for 0x%04X\n",
dev->name, cmd);
printk(KERN_DEBUG "%s (WE.r) : Header type : %d, Token type : %d, size : %d, token : %d\n", dev->name, descr->header_type, descr->token_type, descr->token_size, descr->max_tokens);
#endif /* WE_RTNETLINK_DEBUG */
/* Check if wrqu is complete */
hdr_len = event_type_size[descr->header_type];
if (request_len < hdr_len) {
#ifdef WE_RTNETLINK_DEBUG
printk(KERN_DEBUG
"%s (WE.r) : Wireless request too short (%d)\n",
dev->name, request_len);
#endif /* WE_RTNETLINK_DEBUG */
return -EINVAL;
}
/* Prepare the call */
info.cmd = cmd;
info.flags = 0;
/* Check if we have extra data in the reply or not */
if (descr->header_type != IW_HEADER_TYPE_POINT) {
/* Create the kernel buffer that we will return.
* It's at an offset to match the TYPE_POINT case... */
buffer_size = request_len + IW_EV_POINT_OFF;
buffer = kmalloc(buffer_size, GFP_KERNEL);
if (buffer == NULL) {
return -ENOMEM;
}
/* Copy event data */
memcpy(buffer + IW_EV_POINT_OFF, request, request_len);
/* Use our own copy of wrqu */
wrqu = (union iwreq_data *) (buffer + IW_EV_POINT_OFF
+ IW_EV_LCP_PK_LEN);
/* No extra arguments. Trivial to handle */
ret = handler(dev, &info, wrqu, NULL);
} else {
union iwreq_data wrqu_point;
char * extra = NULL;
int extra_size = 0;
/* Get a temp copy of wrqu (skip pointer) */
memcpy(((char *) &wrqu_point) + IW_EV_POINT_OFF,
((char *) request) + IW_EV_LCP_PK_LEN,
IW_EV_POINT_LEN - IW_EV_LCP_PK_LEN);
/* Calculate space needed by arguments. Always allocate
* for max space. Easier, and won't last long... */
extra_size = descr->max_tokens * descr->token_size;
/* Support for very large requests */
if ((descr->flags & IW_DESCR_FLAG_NOMAX) &&
(wrqu_point.data.length > descr->max_tokens))
extra_size = (wrqu_point.data.length
* descr->token_size);
buffer_size = extra_size + IW_EV_POINT_PK_LEN + IW_EV_POINT_OFF;
#ifdef WE_RTNETLINK_DEBUG
printk(KERN_DEBUG "%s (WE.r) : Malloc %d bytes (%d bytes)\n",
dev->name, extra_size, buffer_size);
#endif /* WE_RTNETLINK_DEBUG */
/* Create the kernel buffer that we will return */
buffer = kmalloc(buffer_size, GFP_KERNEL);
if (buffer == NULL) {
return -ENOMEM;
}
/* Put wrqu in the right place (just before extra).
* Leave space for IWE header and dummy pointer...
* Note that IW_EV_LCP_PK_LEN==4 bytes, so it's still aligned.
*/
memcpy(buffer + IW_EV_LCP_PK_LEN + IW_EV_POINT_OFF,
((char *) &wrqu_point) + IW_EV_POINT_OFF,
IW_EV_POINT_PK_LEN - IW_EV_LCP_PK_LEN);
wrqu = (union iwreq_data *) (buffer + IW_EV_LCP_PK_LEN);
/* Extra comes logically after that. Offset +12 bytes. */
extra = buffer + IW_EV_POINT_OFF + IW_EV_POINT_PK_LEN;
/* Call the handler */
ret = handler(dev, &info, wrqu, extra);
/* Calculate real returned length */
extra_size = (wrqu->data.length * descr->token_size);
/* Re-adjust reply size */
request->len = extra_size + IW_EV_POINT_PK_LEN;
/* Put the iwe header where it should, i.e. scrap the
* dummy pointer. */
memcpy(buffer + IW_EV_POINT_OFF, request, IW_EV_LCP_PK_LEN);
#ifdef WE_RTNETLINK_DEBUG
printk(KERN_DEBUG "%s (WE.r) : Reply 0x%04X, hdr_len %d, tokens %d, extra_size %d, buffer_size %d\n", dev->name, cmd, hdr_len, wrqu->data.length, extra_size, buffer_size);
#endif /* WE_RTNETLINK_DEBUG */
/* Check if there is enough buffer up there */
if (wrqu_point.data.length < wrqu->data.length)
ret = -E2BIG;
}
/* Return the buffer to the caller */
if (!ret) {
*p_buf = buffer;
*p_len = request->len;
} else {
/* Cleanup */
if (buffer)
kfree(buffer);
}
return ret;
}
/* ---------------------------------------------------------------- */
/*
* Wrapper to call a standard Wireless Extension SET handler.
* We do various checks and call the handler with the proper args.
*/
static inline int rtnetlink_standard_set(struct net_device * dev,
struct iw_event * request,
int request_len,
iw_handler handler)
{
const struct iw_ioctl_description * descr = NULL;
unsigned int cmd;
union iwreq_data * wrqu;
union iwreq_data wrqu_point;
int hdr_len;
char * extra = NULL;
int extra_size = 0;
struct iw_request_info info;
int ret = -EINVAL;
/* Get the description of the Request */
cmd = request->cmd;
if ((cmd - SIOCIWFIRST) >= standard_ioctl_num)
return -EOPNOTSUPP;
descr = &(standard_ioctl[cmd - SIOCIWFIRST]);
#ifdef WE_RTNETLINK_DEBUG
printk(KERN_DEBUG "%s (WE.r) : Found standard SET handler for 0x%04X\n",
dev->name, cmd);
printk(KERN_DEBUG "%s (WE.r) : Header type : %d, Token type : %d, size : %d, token : %d\n", dev->name, descr->header_type, descr->token_type, descr->token_size, descr->max_tokens);
#endif /* WE_RTNETLINK_DEBUG */
/* Extract fixed header from request. This is properly aligned. */
wrqu = (union iwreq_data *) (((char *) request) + IW_EV_LCP_PK_LEN);
/* Check if wrqu is complete */
hdr_len = event_type_pk_size[descr->header_type];
if (request_len < hdr_len) {
#ifdef WE_RTNETLINK_DEBUG
printk(KERN_DEBUG
"%s (WE.r) : Wireless request too short (%d)\n",
dev->name, request_len);
#endif /* WE_RTNETLINK_DEBUG */
return -EINVAL;
}
/* Prepare the call */
info.cmd = cmd;
info.flags = 0;
/* Check if we have extra data in the request or not */
if (descr->header_type != IW_HEADER_TYPE_POINT) {
/* No extra arguments. Trivial to handle */
ret = handler(dev, &info, wrqu, NULL);
} else {
int extra_len;
/* Put wrqu in the right place (skip pointer) */
memcpy(((char *) &wrqu_point) + IW_EV_POINT_OFF,
wrqu, IW_EV_POINT_PK_LEN - IW_EV_LCP_PK_LEN);
/* Don't forget about the event code... */
wrqu = &wrqu_point;
/* Check if number of token fits within bounds */
if (wrqu_point.data.length > descr->max_tokens)
return -E2BIG;
if (wrqu_point.data.length < descr->min_tokens)
return -EINVAL;
/* Real length of payload */
extra_len = wrqu_point.data.length * descr->token_size;
/* Check if request is self consistent */
if ((request_len - hdr_len) < extra_len) {
#ifdef WE_RTNETLINK_DEBUG
printk(KERN_DEBUG "%s (WE.r) : Wireless request data too short (%d)\n",
dev->name, extra_size);
#endif /* WE_RTNETLINK_DEBUG */
return -EINVAL;
}
#ifdef WE_RTNETLINK_DEBUG
printk(KERN_DEBUG "%s (WE.r) : Malloc %d bytes\n",
dev->name, extra_size);
#endif /* WE_RTNETLINK_DEBUG */
/* Always allocate for max space. Easier, and won't last
* long... */
extra_size = descr->max_tokens * descr->token_size;
extra = kmalloc(extra_size, GFP_KERNEL);
if (extra == NULL)
return -ENOMEM;
/* Copy extra in aligned buffer */
memcpy(extra, ((char *) request) + hdr_len, extra_len);
/* Call the handler */
ret = handler(dev, &info, &wrqu_point, extra);
}
#ifdef WE_SET_EVENT
/* Generate an event to notify listeners of the change */
if ((descr->flags & IW_DESCR_FLAG_EVENT) &&
((ret == 0) || (ret == -EIWCOMMIT))) {
if (descr->flags & IW_DESCR_FLAG_RESTRICT)
/* If the event is restricted, don't
* export the payload */
wireless_send_event(dev, cmd, wrqu, NULL);
else
wireless_send_event(dev, cmd, wrqu, extra);
}
#endif /* WE_SET_EVENT */
/* Cleanup - I told you it wasn't that long ;-) */
if (extra)
kfree(extra);
/* Call commit handler if needed and defined */
if (ret == -EIWCOMMIT)
ret = call_commit_handler(dev);
return ret;
}
/* ---------------------------------------------------------------- */
/*
* Wrapper to call a private Wireless Extension GET handler.
* Same as above...
* It's not as nice and slimline as the standard wrapper. The cause
* is struct iw_priv_args, which was not really designed for the
* job we are going here.
*
* IMPORTANT : This function prevent to set and get data on the same
* IOCTL and enforce the SET/GET convention. Not doing it would be
* far too hairy...
* If you need to set and get data at the same time, please don't use
* a iw_handler but process it in your ioctl handler (i.e. use the
* old driver API).
*/
static inline int rtnetlink_private_get(struct net_device * dev,
struct iw_event * request,
int request_len,
iw_handler handler,
char ** p_buf,
int * p_len)
{
const struct iw_priv_args * descr = NULL;
unsigned int cmd;
union iwreq_data * wrqu;
int hdr_len;
struct iw_request_info info;
int extra_size = 0;
int i;
char * buffer = NULL;
int buffer_size = 0;
int ret = -EINVAL;
/* Get the description of the Request */
cmd = request->cmd;
for (i = 0; i < dev->wireless_handlers->num_private_args; i++)
if (cmd == dev->wireless_handlers->private_args[i].cmd) {
descr = &(dev->wireless_handlers->private_args[i]);
break;
}
if (descr == NULL)
return -EOPNOTSUPP;
#ifdef WE_RTNETLINK_DEBUG
printk(KERN_DEBUG "%s (WE.r) : Found private handler for 0x%04X\n",
dev->name, cmd);
printk(KERN_DEBUG "%s (WE.r) : Name %s, set %X, get %X\n",
dev->name, descr->name, descr->set_args, descr->get_args);
#endif /* WE_RTNETLINK_DEBUG */
/* Compute the max size of the get arguments */
extra_size = get_priv_size(descr->get_args);
/* Does it fits in wrqu ? */
if ((descr->get_args & IW_PRIV_SIZE_FIXED) &&
(extra_size <= IFNAMSIZ)) {
hdr_len = extra_size;
extra_size = 0;
} else {
hdr_len = IW_EV_POINT_PK_LEN;
}
/* Check if wrqu is complete */
if (request_len < hdr_len) {
#ifdef WE_RTNETLINK_DEBUG
printk(KERN_DEBUG
"%s (WE.r) : Wireless request too short (%d)\n",
dev->name, request_len);
#endif /* WE_RTNETLINK_DEBUG */
return -EINVAL;
}
/* Prepare the call */
info.cmd = cmd;
info.flags = 0;
/* Check if we have a pointer to user space data or not. */
if (extra_size == 0) {
/* Create the kernel buffer that we will return.
* It's at an offset to match the TYPE_POINT case... */
buffer_size = request_len + IW_EV_POINT_OFF;
buffer = kmalloc(buffer_size, GFP_KERNEL);
if (buffer == NULL) {
return -ENOMEM;
}
/* Copy event data */
memcpy(buffer + IW_EV_POINT_OFF, request, request_len);
/* Use our own copy of wrqu */
wrqu = (union iwreq_data *) (buffer + IW_EV_POINT_OFF
+ IW_EV_LCP_PK_LEN);
/* No extra arguments. Trivial to handle */
ret = handler(dev, &info, wrqu, (char *) wrqu);
} else {
char * extra;
/* Buffer for full reply */
buffer_size = extra_size + IW_EV_POINT_PK_LEN + IW_EV_POINT_OFF;
#ifdef WE_RTNETLINK_DEBUG
printk(KERN_DEBUG "%s (WE.r) : Malloc %d bytes (%d bytes)\n",
dev->name, extra_size, buffer_size);
#endif /* WE_RTNETLINK_DEBUG */
/* Create the kernel buffer that we will return */
buffer = kmalloc(buffer_size, GFP_KERNEL);
if (buffer == NULL) {
return -ENOMEM;
}
/* Put wrqu in the right place (just before extra).
* Leave space for IWE header and dummy pointer...
* Note that IW_EV_LCP_PK_LEN==4 bytes, so it's still aligned.
*/
memcpy(buffer + IW_EV_LCP_PK_LEN + IW_EV_POINT_OFF,
((char *) request) + IW_EV_LCP_PK_LEN,
IW_EV_POINT_PK_LEN - IW_EV_LCP_PK_LEN);
wrqu = (union iwreq_data *) (buffer + IW_EV_LCP_PK_LEN);
/* Extra comes logically after that. Offset +12 bytes. */
extra = buffer + IW_EV_POINT_OFF + IW_EV_POINT_PK_LEN;
/* Call the handler */
ret = handler(dev, &info, wrqu, extra);
/* Adjust for the actual length if it's variable,
* avoid leaking kernel bits outside. */
if (!(descr->get_args & IW_PRIV_SIZE_FIXED))
extra_size = adjust_priv_size(descr->get_args, wrqu);
/* Re-adjust reply size */
request->len = extra_size + IW_EV_POINT_PK_LEN;
/* Put the iwe header where it should, i.e. scrap the
* dummy pointer. */
memcpy(buffer + IW_EV_POINT_OFF, request, IW_EV_LCP_PK_LEN);
#ifdef WE_RTNETLINK_DEBUG
printk(KERN_DEBUG "%s (WE.r) : Reply 0x%04X, hdr_len %d, tokens %d, extra_size %d, buffer_size %d\n", dev->name, cmd, hdr_len, wrqu->data.length, extra_size, buffer_size);
#endif /* WE_RTNETLINK_DEBUG */
}
/* Return the buffer to the caller */
if (!ret) {
*p_buf = buffer;
*p_len = request->len;
} else {
/* Cleanup */
if (buffer)
kfree(buffer);
}
return ret;
}
/* ---------------------------------------------------------------- */
/*
* Wrapper to call a private Wireless Extension SET handler.
* Same as above...
* It's not as nice and slimline as the standard wrapper. The cause
* is struct iw_priv_args, which was not really designed for the
* job we are going here.
*
* IMPORTANT : This function prevent to set and get data on the same
* IOCTL and enforce the SET/GET convention. Not doing it would be
* far too hairy...
* If you need to set and get data at the same time, please don't use
* a iw_handler but process it in your ioctl handler (i.e. use the
* old driver API).
*/
static inline int rtnetlink_private_set(struct net_device * dev,
struct iw_event * request,
int request_len,
iw_handler handler)
{
const struct iw_priv_args * descr = NULL;
unsigned int cmd;
union iwreq_data * wrqu;
union iwreq_data wrqu_point;
int hdr_len;
char * extra = NULL;
int extra_size = 0;
int offset = 0; /* For sub-ioctls */
struct iw_request_info info;
int i;
int ret = -EINVAL;
/* Get the description of the Request */
cmd = request->cmd;
for (i = 0; i < dev->wireless_handlers->num_private_args; i++)
if (cmd == dev->wireless_handlers->private_args[i].cmd) {
descr = &(dev->wireless_handlers->private_args[i]);
break;
}
if (descr == NULL)
return -EOPNOTSUPP;
#ifdef WE_RTNETLINK_DEBUG
printk(KERN_DEBUG "%s (WE.r) : Found private handler for 0x%04X\n",
ifr->ifr_name, cmd);
printk(KERN_DEBUG "%s (WE.r) : Name %s, set %X, get %X\n",
dev->name, descr->name, descr->set_args, descr->get_args);
#endif /* WE_RTNETLINK_DEBUG */
/* Compute the size of the set arguments */
/* Check for sub-ioctl handler */
if (descr->name[0] == '\0')
/* Reserve one int for sub-ioctl index */
offset = sizeof(__u32);
/* Size of set arguments */
extra_size = get_priv_size(descr->set_args);
/* Does it fits in wrqu ? */
if ((descr->set_args & IW_PRIV_SIZE_FIXED) &&
(extra_size <= IFNAMSIZ)) {
hdr_len = IW_EV_LCP_PK_LEN + extra_size;
extra_size = 0;
} else {
hdr_len = IW_EV_POINT_PK_LEN;
}
/* Extract fixed header from request. This is properly aligned. */
wrqu = (union iwreq_data *) (((char *) request) + IW_EV_LCP_PK_LEN);
/* Check if wrqu is complete */
if (request_len < hdr_len) {
#ifdef WE_RTNETLINK_DEBUG
printk(KERN_DEBUG
"%s (WE.r) : Wireless request too short (%d)\n",
dev->name, request_len);
#endif /* WE_RTNETLINK_DEBUG */
return -EINVAL;
}
/* Prepare the call */
info.cmd = cmd;
info.flags = 0;
/* Check if we have a pointer to user space data or not. */
if (extra_size == 0) {
/* No extra arguments. Trivial to handle */
ret = handler(dev, &info, wrqu, (char *) wrqu);
} else {
int extra_len;
/* Put wrqu in the right place (skip pointer) */
memcpy(((char *) &wrqu_point) + IW_EV_POINT_OFF,
wrqu, IW_EV_POINT_PK_LEN - IW_EV_LCP_PK_LEN);
/* Does it fits within bounds ? */
if (wrqu_point.data.length > (descr->set_args &
IW_PRIV_SIZE_MASK))
return -E2BIG;
/* Real length of payload */
extra_len = adjust_priv_size(descr->set_args, &wrqu_point);
/* Check if request is self consistent */
if ((request_len - hdr_len) < extra_len) {
#ifdef WE_RTNETLINK_DEBUG
printk(KERN_DEBUG "%s (WE.r) : Wireless request data too short (%d)\n",
dev->name, extra_size);
#endif /* WE_RTNETLINK_DEBUG */
return -EINVAL;
}
#ifdef WE_RTNETLINK_DEBUG
printk(KERN_DEBUG "%s (WE.r) : Malloc %d bytes\n",
dev->name, extra_size);
#endif /* WE_RTNETLINK_DEBUG */
/* Always allocate for max space. Easier, and won't last
* long... */
extra = kmalloc(extra_size, GFP_KERNEL);
if (extra == NULL)
return -ENOMEM;
/* Copy extra in aligned buffer */
memcpy(extra, ((char *) request) + hdr_len, extra_len);
/* Call the handler */
ret = handler(dev, &info, &wrqu_point, extra);
/* Cleanup - I told you it wasn't that long ;-) */
kfree(extra);
}
/* Call commit handler if needed and defined */
if (ret == -EIWCOMMIT)
ret = call_commit_handler(dev);
return ret;
}
/* ---------------------------------------------------------------- */
/*
* Main RtNetlink dispatcher. Called from the main networking code
* (do_getlink() in net/core/rtnetlink.c).
* Check the type of Request and call the appropriate wrapper...
*/
int wireless_rtnetlink_get(struct net_device * dev,
char * data,
int len,
char ** p_buf,
int * p_len)
{
struct iw_event * request = (struct iw_event *) data;
iw_handler handler;
/* Check length */
if (len < IW_EV_LCP_PK_LEN) {
printk(KERN_DEBUG "%s (WE.r) : RtNetlink request too short (%d)\n",
dev->name, len);
return -EINVAL;
}
/* ReCheck length (len may have padding) */
if (request->len > len) {
printk(KERN_DEBUG "%s (WE.r) : RtNetlink request len invalid (%d-%d)\n",
dev->name, request->len, len);
return -EINVAL;
}
/* Only accept GET requests in here */
if (!IW_IS_GET(request->cmd))
return -EOPNOTSUPP;
/* If command is `get the encoding parameters', check if
* the user has the right to do it */
if (request->cmd == SIOCGIWENCODE ||
request->cmd == SIOCGIWENCODEEXT) {
if (!capable(CAP_NET_ADMIN))
return -EPERM;
}
/* Special cases */
if (request->cmd == SIOCGIWSTATS)
/* Get Wireless Stats */
return rtnetlink_standard_get(dev,
request,
request->len,
&iw_handler_get_iwstats,
p_buf, p_len);
if (request->cmd == SIOCGIWPRIV) {
/* Check if we have some wireless handlers defined */
if (dev->wireless_handlers == NULL)
return -EOPNOTSUPP;
/* Get Wireless Stats */
return rtnetlink_standard_get(dev,
request,
request->len,
&iw_handler_get_private,
p_buf, p_len);
}
/* Basic check */
if (!netif_device_present(dev))
return -ENODEV;
/* Try to find the handler */
handler = get_handler(dev, request->cmd);
if (handler != NULL) {
/* Standard and private are not the same */
if (request->cmd < SIOCIWFIRSTPRIV)
return rtnetlink_standard_get(dev,
request,
request->len,
handler,
p_buf, p_len);
else
return rtnetlink_private_get(dev,
request,
request->len,
handler,
p_buf, p_len);
}
return -EOPNOTSUPP;
}
/* ---------------------------------------------------------------- */
/*
* Main RtNetlink dispatcher. Called from the main networking code
* (do_setlink() in net/core/rtnetlink.c).
* Check the type of Request and call the appropriate wrapper...
*/
int wireless_rtnetlink_set(struct net_device * dev,
char * data,
int len)
{
struct iw_event * request = (struct iw_event *) data;
iw_handler handler;
/* Check length */
if (len < IW_EV_LCP_PK_LEN) {
printk(KERN_DEBUG "%s (WE.r) : RtNetlink request too short (%d)\n",
dev->name, len);
return -EINVAL;
}
/* ReCheck length (len may have padding) */
if (request->len > len) {
printk(KERN_DEBUG "%s (WE.r) : RtNetlink request len invalid (%d-%d)\n",
dev->name, request->len, len);
return -EINVAL;
}
/* Only accept SET requests in here */
if (!IW_IS_SET(request->cmd))
return -EOPNOTSUPP;
/* Basic check */
if (!netif_device_present(dev))
return -ENODEV;
/* New driver API : try to find the handler */
handler = get_handler(dev, request->cmd);
if (handler != NULL) {
/* Standard and private are not the same */
if (request->cmd < SIOCIWFIRSTPRIV)
return rtnetlink_standard_set(dev,
request,
request->len,
handler);
else
return rtnetlink_private_set(dev,
request,
request->len,
handler);
}
return -EOPNOTSUPP;
}
#endif /* CONFIG_NET_WIRELESS_RTNETLINK */
/************************* EVENT PROCESSING *************************/ /************************* EVENT PROCESSING *************************/
/* /*

10
net/wireless/Kconfig
View File

@ -14,13 +14,3 @@ config WIRELESS_EXT
Say N (if you can) unless you know you need wireless Say N (if you can) unless you know you need wireless
extensions for external modules. extensions for external modules.
config NET_WIRELESS_RTNETLINK
bool "Wireless Extension API over RtNetlink"
depends on WIRELESS_EXT
---help---
Support the Wireless Extension API over the RtNetlink socket
in addition to the traditional ioctl interface (selected above).
For now, few tools use this facility, but it might grow in the
future. The only downside is that it adds 4.5 kB to your kernel.