[PATCH] libertas: fix 'keep previous scan' behavior
Do not clear the scan list except under specific conditions, such as when (a) user-requested, or (b) joining/starting an adhoc network. Furthermore, only clear entries which match the SSID or BSSID of the request, not the whole scan list. Signed-off-by: Dan Williams <dcbw@redhat.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Dan Williams
John W. Linville
Родитель
fcdb53dbc7
Коммит
eb8f7330e7
|
|
@ -25,7 +25,7 @@ static int assoc_helper_essid(wlan_private *priv,
|
|||
lbs_deb_assoc("New SSID requested: %s\n", assoc_req->ssid.ssid);
|
||||
if (assoc_req->mode == IW_MODE_INFRA) {
|
||||
if (adapter->prescan) {
|
||||
libertas_send_specific_SSID_scan(priv, &assoc_req->ssid, 1);
|
||||
libertas_send_specific_SSID_scan(priv, &assoc_req->ssid, 0);
|
||||
}
|
||||
|
||||
bss = libertas_find_SSID_in_list(adapter, &assoc_req->ssid,
|
||||
|
|
@ -44,7 +44,7 @@ static int assoc_helper_essid(wlan_private *priv,
|
|||
/* Scan for the network, do not save previous results. Stale
|
||||
* scan data will cause us to join a non-existant adhoc network
|
||||
*/
|
||||
libertas_send_specific_SSID_scan(priv, &assoc_req->ssid, 0);
|
||||
libertas_send_specific_SSID_scan(priv, &assoc_req->ssid, 1);
|
||||
|
||||
/* Search for the requested SSID in the scan table */
|
||||
bss = libertas_find_SSID_in_list(adapter, &assoc_req->ssid, NULL,
|
||||
|
|
|
|||
|
|
@ -193,7 +193,7 @@ static ssize_t libertas_extscan(struct file *file, const char __user *userbuf,
|
|||
memcpy(&extscan_ssid.ssid, buf, strlen(buf)-1);
|
||||
extscan_ssid.ssidlength = strlen(buf)-1;
|
||||
|
||||
libertas_send_specific_SSID_scan(priv, &extscan_ssid, 1);
|
||||
libertas_send_specific_SSID_scan(priv, &extscan_ssid, 0);
|
||||
|
||||
memset(&wrqu, 0, sizeof(union iwreq_data));
|
||||
wireless_send_event(priv->dev, SIOCGIWSCAN, &wrqu, NULL);
|
||||
|
|
@ -245,16 +245,13 @@ static void libertas_parse_bssid(char *buf, size_t count,
|
|||
{
|
||||
char *hold;
|
||||
unsigned int mac[ETH_ALEN];
|
||||
int i;
|
||||
|
||||
hold = strstr(buf, "bssid=");
|
||||
if (!hold)
|
||||
return;
|
||||
hold += 6;
|
||||
sscanf(hold, "%2x:%2x:%2x:%2x:%2x:%2x", mac, mac+1, mac+2, mac+3,
|
||||
mac+4, mac+5);
|
||||
for(i=0;i<ETH_ALEN;i++)
|
||||
scan_cfg->specificBSSID[i] = mac[i];
|
||||
sscanf(hold, MAC_FMT, mac, mac+1, mac+2, mac+3, mac+4, mac+5);
|
||||
memcpy(scan_cfg->bssid, mac, ETH_ALEN);
|
||||
}
|
||||
|
||||
static void libertas_parse_ssid(char *buf, size_t count,
|
||||
|
|
@ -272,28 +269,26 @@ static void libertas_parse_ssid(char *buf, size_t count,
|
|||
end = buf + count - 1;
|
||||
|
||||
size = min((size_t)IW_ESSID_MAX_SIZE, (size_t) (end - hold));
|
||||
strncpy(scan_cfg->specificSSID, hold, size);
|
||||
strncpy(scan_cfg->ssid, hold, size);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
static void libertas_parse_keep(char *buf, size_t count,
|
||||
struct wlan_ioctl_user_scan_cfg *scan_cfg)
|
||||
static int libertas_parse_clear(char *buf, size_t count, const char *tag)
|
||||
{
|
||||
char *hold;
|
||||
int val;
|
||||
|
||||
hold = strstr(buf, "keep=");
|
||||
hold = strstr(buf, tag);
|
||||
if (!hold)
|
||||
return;
|
||||
hold += 5;
|
||||
return 0;
|
||||
hold += strlen(tag);
|
||||
sscanf(hold, "%d", &val);
|
||||
|
||||
if (val != 0)
|
||||
val = 1;
|
||||
|
||||
scan_cfg->keeppreviousscan = val;
|
||||
return;
|
||||
return val;
|
||||
}
|
||||
|
||||
static int libertas_parse_dur(char *buf, size_t count,
|
||||
|
|
@ -376,8 +371,9 @@ static ssize_t libertas_setuserscan(struct file *file,
|
|||
dur = libertas_parse_dur(buf, count, scan_cfg);
|
||||
libertas_parse_chan(buf, count, scan_cfg, dur);
|
||||
libertas_parse_bssid(buf, count, scan_cfg);
|
||||
scan_cfg->clear_bssid = libertas_parse_clear(buf, count, "clear_bssid=");
|
||||
libertas_parse_ssid(buf, count, scan_cfg);
|
||||
libertas_parse_keep(buf, count, scan_cfg);
|
||||
scan_cfg->clear_ssid = libertas_parse_clear(buf, count, "clear_ssid=");
|
||||
libertas_parse_probes(buf, count, scan_cfg);
|
||||
libertas_parse_type(buf, count, scan_cfg);
|
||||
|
||||
|
|
|
|||
|
|
@ -59,6 +59,9 @@
|
|||
//! Scan time specified in the channel TLV for each channel for active scans
|
||||
#define MRVDRV_ACTIVE_SCAN_CHAN_TIME 100
|
||||
|
||||
const u8 zeromac[ETH_ALEN] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
|
||||
const u8 bcastmac[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
|
||||
|
||||
static inline void clear_bss_descriptor (struct bss_descriptor * bss)
|
||||
{
|
||||
/* Don't blow away ->list, just BSS data */
|
||||
|
|
@ -409,13 +412,11 @@ wlan_scan_setup_scan_config(wlan_private * priv,
|
|||
u8 * pscancurrentonly)
|
||||
{
|
||||
wlan_adapter *adapter = priv->adapter;
|
||||
const u8 zeromac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
|
||||
struct mrvlietypes_numprobes *pnumprobestlv;
|
||||
struct mrvlietypes_ssidparamset *pssidtlv;
|
||||
struct wlan_scan_cmd_config * pscancfgout = NULL;
|
||||
u8 *ptlvpos;
|
||||
u16 numprobes;
|
||||
u16 ssidlen;
|
||||
int chanidx;
|
||||
int scantype;
|
||||
int scandur;
|
||||
|
|
@ -472,21 +473,18 @@ wlan_scan_setup_scan_config(wlan_private * priv,
|
|||
* Set the BSSID filter to the incoming configuration,
|
||||
* if non-zero. If not set, it will remain disabled (all zeros).
|
||||
*/
|
||||
memcpy(pscancfgout->specificBSSID,
|
||||
puserscanin->specificBSSID,
|
||||
sizeof(pscancfgout->specificBSSID));
|
||||
memcpy(pscancfgout->bssid, puserscanin->bssid,
|
||||
sizeof(pscancfgout->bssid));
|
||||
|
||||
ssidlen = strlen(puserscanin->specificSSID);
|
||||
|
||||
if (ssidlen) {
|
||||
if (puserscanin->ssid_len) {
|
||||
pssidtlv =
|
||||
(struct mrvlietypes_ssidparamset *) pscancfgout->
|
||||
tlvbuffer;
|
||||
pssidtlv->header.type = cpu_to_le16(TLV_TYPE_SSID);
|
||||
pssidtlv->header.len = cpu_to_le16(ssidlen);
|
||||
memcpy(pssidtlv->ssid, puserscanin->specificSSID,
|
||||
ssidlen);
|
||||
ptlvpos += sizeof(pssidtlv->header) + ssidlen;
|
||||
pssidtlv->header.len = cpu_to_le16(puserscanin->ssid_len);
|
||||
memcpy(pssidtlv->ssid, puserscanin->ssid,
|
||||
puserscanin->ssid_len);
|
||||
ptlvpos += sizeof(pssidtlv->header) + puserscanin->ssid_len;
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -495,8 +493,8 @@ wlan_scan_setup_scan_config(wlan_private * priv,
|
|||
* scan results. That is not an issue with an SSID or BSSID
|
||||
* filter applied to the scan results in the firmware.
|
||||
*/
|
||||
if (ssidlen || (memcmp(pscancfgout->specificBSSID,
|
||||
&zeromac, sizeof(zeromac)) != 0)) {
|
||||
if ( puserscanin->ssid_len
|
||||
|| (compare_ether_addr(pscancfgout->bssid, &zeromac[0]) != 0)) {
|
||||
*pmaxchanperscan = MRVDRV_MAX_CHANNELS_PER_SCAN;
|
||||
*pfilteredscan = 1;
|
||||
}
|
||||
|
|
@ -743,6 +741,53 @@ done:
|
|||
return ret;
|
||||
}
|
||||
|
||||
static void
|
||||
clear_selected_scan_list_entries(wlan_adapter * adapter,
|
||||
const struct wlan_ioctl_user_scan_cfg * scan_cfg)
|
||||
{
|
||||
struct bss_descriptor * bss;
|
||||
struct bss_descriptor * safe;
|
||||
u32 clear_ssid_flag = 0, clear_bssid_flag = 0;
|
||||
|
||||
if (!scan_cfg)
|
||||
return;
|
||||
|
||||
if (scan_cfg->clear_ssid && scan_cfg->ssid_len)
|
||||
clear_ssid_flag = 1;
|
||||
|
||||
if (scan_cfg->clear_bssid
|
||||
&& (compare_ether_addr(scan_cfg->bssid, &zeromac[0]) != 0)
|
||||
&& (compare_ether_addr(scan_cfg->bssid, &bcastmac[0]) != 0)) {
|
||||
clear_bssid_flag = 1;
|
||||
}
|
||||
|
||||
if (!clear_ssid_flag && !clear_bssid_flag)
|
||||
return;
|
||||
|
||||
mutex_lock(&adapter->lock);
|
||||
list_for_each_entry_safe (bss, safe, &adapter->network_list, list) {
|
||||
u32 clear = 0;
|
||||
|
||||
/* Check for an SSID match */
|
||||
if ( clear_ssid_flag
|
||||
&& (bss->ssid.ssidlength == scan_cfg->ssid_len)
|
||||
&& !memcmp(bss->ssid.ssid, scan_cfg->ssid, bss->ssid.ssidlength))
|
||||
clear = 1;
|
||||
|
||||
/* Check for a BSSID match */
|
||||
if ( clear_bssid_flag
|
||||
&& !compare_ether_addr(bss->bssid, scan_cfg->bssid))
|
||||
clear = 1;
|
||||
|
||||
if (clear) {
|
||||
list_move_tail (&bss->list, &adapter->network_free_list);
|
||||
clear_bss_descriptor(bss);
|
||||
}
|
||||
}
|
||||
mutex_unlock(&adapter->lock);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* @brief Internal function used to start a scan based on an input config
|
||||
*
|
||||
|
|
@ -764,7 +809,6 @@ int wlan_scan_networks(wlan_private * priv,
|
|||
struct mrvlietypes_chanlistparamset *pchantlvout;
|
||||
struct chanscanparamset * scan_chan_list = NULL;
|
||||
struct wlan_scan_cmd_config * scan_cfg = NULL;
|
||||
u8 keeppreviousscan;
|
||||
u8 filteredscan;
|
||||
u8 scancurrentchanonly;
|
||||
int maxchanperscan;
|
||||
|
|
@ -791,28 +835,7 @@ int wlan_scan_networks(wlan_private * priv,
|
|||
goto out;
|
||||
}
|
||||
|
||||
keeppreviousscan = 0;
|
||||
|
||||
if (puserscanin) {
|
||||
keeppreviousscan = puserscanin->keeppreviousscan;
|
||||
}
|
||||
|
||||
if (adapter->last_scanned_channel)
|
||||
keeppreviousscan = 1;
|
||||
|
||||
if (!keeppreviousscan) {
|
||||
struct bss_descriptor * iter_bss;
|
||||
struct bss_descriptor * safe;
|
||||
|
||||
mutex_lock(&adapter->lock);
|
||||
list_for_each_entry_safe (iter_bss, safe,
|
||||
&adapter->network_list, list) {
|
||||
list_move_tail (&iter_bss->list,
|
||||
&adapter->network_free_list);
|
||||
clear_bss_descriptor(iter_bss);
|
||||
}
|
||||
mutex_unlock(&adapter->lock);
|
||||
}
|
||||
clear_selected_scan_list_entries(adapter, puserscanin);
|
||||
|
||||
/* Keep the data path active if we are only scanning our current channel */
|
||||
if (!scancurrentchanonly) {
|
||||
|
|
@ -1434,30 +1457,30 @@ int libertas_set_scan(struct net_device *dev, struct iw_request_info *info,
|
|||
*/
|
||||
int libertas_send_specific_SSID_scan(wlan_private * priv,
|
||||
struct WLAN_802_11_SSID *prequestedssid,
|
||||
u8 keeppreviousscan)
|
||||
u8 clear_ssid)
|
||||
{
|
||||
wlan_adapter *adapter = priv->adapter;
|
||||
struct wlan_ioctl_user_scan_cfg scancfg;
|
||||
int ret = 0;
|
||||
|
||||
lbs_deb_enter(LBS_DEB_ASSOC);
|
||||
|
||||
if (prequestedssid == NULL) {
|
||||
return -1;
|
||||
}
|
||||
if (prequestedssid == NULL)
|
||||
goto out;
|
||||
|
||||
memset(&scancfg, 0x00, sizeof(scancfg));
|
||||
|
||||
memcpy(scancfg.specificSSID, prequestedssid->ssid,
|
||||
prequestedssid->ssidlength);
|
||||
scancfg.keeppreviousscan = keeppreviousscan;
|
||||
memcpy(scancfg.ssid, prequestedssid->ssid, prequestedssid->ssidlength);
|
||||
scancfg.ssid_len = prequestedssid->ssidlength;
|
||||
scancfg.clear_ssid = clear_ssid;
|
||||
|
||||
wlan_scan_networks(priv, &scancfg, 1);
|
||||
if (adapter->surpriseremoved)
|
||||
return -1;
|
||||
wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending);
|
||||
|
||||
out:
|
||||
lbs_deb_leave(LBS_DEB_ASSOC);
|
||||
return 0;
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -1469,19 +1492,18 @@ int libertas_send_specific_SSID_scan(wlan_private * priv,
|
|||
*
|
||||
* @return 0-success, otherwise fail
|
||||
*/
|
||||
int libertas_send_specific_BSSID_scan(wlan_private * priv, u8 * bssid, u8 keeppreviousscan)
|
||||
int libertas_send_specific_BSSID_scan(wlan_private * priv, u8 * bssid, u8 clear_bssid)
|
||||
{
|
||||
struct wlan_ioctl_user_scan_cfg scancfg;
|
||||
|
||||
lbs_deb_enter(LBS_DEB_ASSOC);
|
||||
|
||||
if (bssid == NULL) {
|
||||
return -1;
|
||||
}
|
||||
if (bssid == NULL)
|
||||
goto out;
|
||||
|
||||
memset(&scancfg, 0x00, sizeof(scancfg));
|
||||
memcpy(scancfg.specificBSSID, bssid, sizeof(scancfg.specificBSSID));
|
||||
scancfg.keeppreviousscan = keeppreviousscan;
|
||||
memcpy(scancfg.bssid, bssid, ETH_ALEN);
|
||||
scancfg.clear_bssid = clear_bssid;
|
||||
|
||||
wlan_scan_networks(priv, &scancfg, 1);
|
||||
if (priv->adapter->surpriseremoved)
|
||||
|
|
@ -1489,6 +1511,7 @@ int libertas_send_specific_BSSID_scan(wlan_private * priv, u8 * bssid, u8 keeppr
|
|||
wait_event_interruptible(priv->adapter->cmd_pending,
|
||||
!priv->adapter->nr_cmd_pending);
|
||||
|
||||
out:
|
||||
lbs_deb_leave(LBS_DEB_ASSOC);
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -1727,7 +1750,7 @@ int libertas_cmd_80211_scan(wlan_private * priv,
|
|||
|
||||
/* Set fixed field variables in scan command */
|
||||
pscan->bsstype = pscancfg->bsstype;
|
||||
memcpy(pscan->BSSID, pscancfg->specificBSSID, sizeof(pscan->BSSID));
|
||||
memcpy(pscan->BSSID, pscancfg->bssid, sizeof(pscan->BSSID));
|
||||
memcpy(pscan->tlvbuffer, pscancfg->tlvbuffer, pscancfg->tlvbufferlen);
|
||||
|
||||
cmd->command = cpu_to_le16(cmd_802_11_scan);
|
||||
|
|
|
|||
|
|
@ -51,7 +51,7 @@ struct wlan_scan_cmd_config {
|
|||
/**
|
||||
* @brief Specific BSSID used to filter scan results in the firmware
|
||||
*/
|
||||
u8 specificBSSID[ETH_ALEN];
|
||||
u8 bssid[ETH_ALEN];
|
||||
|
||||
/**
|
||||
* @brief length of TLVs sent in command starting at tlvBuffer
|
||||
|
|
@ -91,15 +91,6 @@ struct wlan_ioctl_user_scan_chan {
|
|||
* @sa libertas_set_user_scan_ioctl
|
||||
*/
|
||||
struct wlan_ioctl_user_scan_cfg {
|
||||
|
||||
/**
|
||||
* @brief Flag set to keep the previous scan table intact
|
||||
*
|
||||
* If set, the scan results will accumulate, replacing any previous
|
||||
* matched entries for a BSS with the new scan data
|
||||
*/
|
||||
u8 keeppreviousscan; //!< Do not erase the existing scan results
|
||||
|
||||
/**
|
||||
* @brief BSS type to be sent in the firmware command
|
||||
*
|
||||
|
|
@ -120,12 +111,19 @@ struct wlan_ioctl_user_scan_cfg {
|
|||
/**
|
||||
* @brief BSSID filter sent in the firmware command to limit the results
|
||||
*/
|
||||
u8 specificBSSID[ETH_ALEN];
|
||||
u8 bssid[ETH_ALEN];
|
||||
|
||||
/* Clear existing scan results matching this BSSID */
|
||||
u8 clear_bssid;
|
||||
|
||||
/**
|
||||
* @brief SSID filter sent in the firmware command to limit the results
|
||||
*/
|
||||
char specificSSID[IW_ESSID_MAX_SIZE + 1];
|
||||
char ssid[IW_ESSID_MAX_SIZE];
|
||||
u8 ssid_len;
|
||||
|
||||
/* Clear existing scan results matching this SSID */
|
||||
u8 clear_ssid;
|
||||
|
||||
/**
|
||||
* @brief Variable number (fixed maximum) of channels to scan up
|
||||
|
|
@ -194,9 +192,9 @@ int libertas_find_best_network_SSID(wlan_private * priv,
|
|||
|
||||
extern int libertas_send_specific_SSID_scan(wlan_private * priv,
|
||||
struct WLAN_802_11_SSID *prequestedssid,
|
||||
u8 keeppreviousscan);
|
||||
u8 clear_ssid);
|
||||
extern int libertas_send_specific_BSSID_scan(wlan_private * priv,
|
||||
u8 * bssid, u8 keeppreviousscan);
|
||||
u8 * bssid, u8 clear_bssid);
|
||||
|
||||
extern int libertas_cmd_80211_scan(wlan_private * priv,
|
||||
struct cmd_ds_command *cmd,
|
||||
|
|
|
|||
|
|
@ -234,7 +234,7 @@ static int changeadhocchannel(wlan_private * priv, int channel)
|
|||
/* Scan for the network, do not save previous results. Stale
|
||||
* scan data will cause us to join a non-existant adhoc network
|
||||
*/
|
||||
libertas_send_specific_SSID_scan(priv, &curadhocssid, 0);
|
||||
libertas_send_specific_SSID_scan(priv, &curadhocssid, 1);
|
||||
|
||||
/* find out the BSSID that matches the current SSID */
|
||||
join_bss = libertas_find_SSID_in_list(adapter, &curadhocssid, NULL,
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче