Amazing-Mirror/fragattacks
1
0
Fork 0
mirror of https://github.com/vanhoefm/fragattacks.git synced 2024-11-28 18:28:23 -05:00
Code Issues Projects Releases Wiki Activity

Deplete scan request if new time is less than remaining

Browse Source 
This avoids pushing out previous scheduled scan requests based on new
events.

Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
This commit is contained in:
Dmitry Shmidt 2013-11-11 11:13:17 -08:00 committed by Jouni Malinen
parent a572f0b960
commit e2f5a9889a
4 changed files with 85 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
src/utils/eloop.c
View File

@ -599,6 +599,37 @@ int eloop_is_timeout_registered(eloop_timeout_handler handler,
}
int eloop_deplete_timeout(unsigned int req_secs, unsigned int req_usecs,
eloop_timeout_handler handler, void *eloop_data,
void *user_data)
{
struct os_time now, requested, remaining;
struct eloop_timeout *tmp;
dl_list_for_each(tmp, &eloop.timeout, struct eloop_timeout, list) {
if (tmp->handler == handler &&
tmp->eloop_data == eloop_data &&
tmp->user_data == user_data) {
requested.sec = req_secs;
requested.usec = req_usecs;
os_get_time(&now);
os_time_sub(&tmp->time, &now, &remaining);
if (os_time_before(&requested, &remaining)) {
eloop_cancel_timeout(handler, eloop_data,
user_data);
eloop_register_timeout(requested.sec,
requested.usec,
handler, eloop_data,
user_data);
return 1;
}
}
}
return 0;
}
int eloop_replenish_timeout(unsigned int req_secs, unsigned int req_usecs,
eloop_timeout_handler handler, void *eloop_data,
void *user_data)

16
src/utils/eloop.h
View File

@ -222,6 +222,22 @@ int eloop_cancel_timeout_one(eloop_timeout_handler handler,
int eloop_is_timeout_registered(eloop_timeout_handler handler,
void *eloop_data, void *user_data);
/**
* eloop_deplete_timeout - Deplete a timeout that is already registered
* @req_secs: Requested number of seconds to the timeout
* @req_usecs: Requested number of microseconds to the timeout
* @handler: Matching callback function
* @eloop_data: Matching eloop_data
* @user_data: Matching user_data
* Returns: 1 if the timeout is depleted, 0 if no change is made
*
* Find a registered matching <handler,eloop_data,user_data> timeout. If found,
* deplete the timeout if remaining time is more than the requested time.
*/
int eloop_deplete_timeout(unsigned int req_secs, unsigned int req_usecs,
eloop_timeout_handler handler, void *eloop_data,
void *user_data);
/**
* eloop_replenish_timeout - Replenish a timeout that is already registered
* @req_secs: Requested number of seconds to the timeout

31
src/utils/eloop_win.c
View File

@ -354,6 +354,37 @@ int eloop_is_timeout_registered(eloop_timeout_handler handler,
}
int eloop_deplete_timeout(unsigned int req_secs, unsigned int req_usecs,
eloop_timeout_handler handler, void *eloop_data,
void *user_data)
{
struct os_time now, requested, remaining;
struct eloop_timeout *tmp;
dl_list_for_each(tmp, &eloop.timeout, struct eloop_timeout, list) {
if (tmp->handler == handler &&
tmp->eloop_data == eloop_data &&
tmp->user_data == user_data) {
requested.sec = req_secs;
requested.usec = req_usecs;
os_get_time(&now);
os_time_sub(&tmp->time, &now, &remaining);
if (os_time_before(&requested, &remaining)) {
eloop_cancel_timeout(handler, eloop_data,
user_data);
eloop_register_timeout(requested.sec,
requested.usec,
handler, eloop_data,
user_data);
return 1;
}
}
}
return 0;
}
int eloop_replenish_timeout(unsigned int req_secs, unsigned int req_usecs,
eloop_timeout_handler handler, void *eloop_data,
void *user_data)

7
wpa_supplicant/scan.c
View File

@ -907,6 +907,13 @@ void wpa_supplicant_update_scan_int(struct wpa_supplicant *wpa_s, int sec)
*/
void wpa_supplicant_req_scan(struct wpa_supplicant *wpa_s, int sec, int usec)
{
if (eloop_deplete_timeout(sec, usec, wpa_supplicant_scan, wpa_s, NULL))
{
wpa_dbg(wpa_s, MSG_DEBUG, "Rescheduling scan request: %d sec %d usec",
sec, usec);
return;
}
/* If there's at least one network that should be specifically scanned
* then don't cancel the scan and reschedule. Some drivers do
* background scanning which generates frequent scan results, and that