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wl12xx: add support for multiple SSIDs in sched_scan 

The wl12xx firmwares support multiple SSIDs in a single sched_scan
run.  This patch implements support for it.

We use three different types os sched_scan: FILTER_ANY (ie. not
filtering, only wildcard SSID in the probe_reqs); FILTER_LIST (ie. send out
probe_reqs with the specified SSIDs and only report if they are
found); and FILTER_DISABLED (ie. send out probe_reqs with the
specified SSIDs, but report anything found).

Since we still don't have proper filter support in nl80211/cfg80211
yet, we cannot use filters when the wildcard SSID is used.  Thus, we
will not filter anything if the wildcard SSID is specified.

Signed-off-by: Luciano Coelho <coelho@ti.com>
This commit is contained in:
Luciano Coelho 2011-08-23 18:34:44 +03:00
parent 05dba35506
commit f952079a19
2 changed files with 57 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/wireless/wl12xx/main.c
View File

@ -4491,6 +4491,7 @@ int wl1271_init_ieee80211(struct wl1271 *wl)
wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_AP);
wl->hw->wiphy->max_scan_ssids = 1;
wl->hw->wiphy->max_sched_scan_ssids = 8;
/*
* Maximum length of elements in scanning probe request templates
* should be the maximum length possible for a template, without

63
drivers/net/wireless/wl12xx/scan.c
View File

@ -473,6 +473,48 @@ wl1271_scan_sched_scan_channels(struct wl1271 *wl,
cfg->passive[2] || cfg->active[2];
}
/* Returns 0 if no wildcard is used, 1 if wildcard is used or a
* negative value on error */
static int
wl12xx_scan_sched_scan_ssid_list(struct wl1271 *wl,
struct cfg80211_sched_scan_request *req)
{
struct wl1271_cmd_sched_scan_ssid_list *cmd = NULL;
struct cfg80211_ssid *ssid = req->ssids;
int ret, wildcard = 0;
wl1271_debug(DEBUG_CMD, "cmd sched scan ssid list");
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (!cmd)
return -ENOMEM;
while ((cmd->n_ssids < req->n_ssids) && ssid) {
if (ssid->ssid_len == 0)
wildcard = 1;
cmd->ssids[cmd->n_ssids].type = SCAN_SSID_TYPE_HIDDEN;
cmd->ssids[cmd->n_ssids].len = ssid->ssid_len;
memcpy(cmd->ssids[cmd->n_ssids].ssid, ssid->ssid,
ssid->ssid_len);
ssid++;
cmd->n_ssids++;
}
wl1271_dump(DEBUG_SCAN, "SSID_LIST: ", cmd, sizeof(*cmd));
ret = wl1271_cmd_send(wl, CMD_CONNECTION_SCAN_SSID_CFG, cmd,
sizeof(*cmd), 0);
if (ret < 0) {
wl1271_error("cmd sched scan ssid list failed");
goto out;
}
ret = wildcard;
out:
kfree(cmd);
return ret;
}
int wl1271_scan_sched_scan_config(struct wl1271 *wl,
struct cfg80211_sched_scan_request *req,
struct ieee80211_sched_scan_ies *ies)
@ -504,14 +546,21 @@ int wl1271_scan_sched_scan_config(struct wl1271 *wl,
for (i = 0; i < SCAN_MAX_CYCLE_INTERVALS; i++)
cfg->intervals[i] = cpu_to_le32(req->interval);
if (!force_passive && req->ssids[0].ssid_len && req->ssids[0].ssid) {
cfg->filter_type = SCAN_SSID_FILTER_SPECIFIC;
cfg->ssid_len = req->ssids[0].ssid_len;
memcpy(cfg->ssid, req->ssids[0].ssid,
req->ssids[0].ssid_len);
} else {
cfg->ssid_len = 0;
if (req->n_ssids == 0) {
wl1271_debug(DEBUG_SCAN, "using SCAN_SSID_FILTER_ANY");
cfg->filter_type = SCAN_SSID_FILTER_ANY;
cfg->ssid_len = 0;
} else {
ret = wl12xx_scan_sched_scan_ssid_list(wl, req);
if (ret < 0)
goto out;
if (ret) {
wl1271_debug(DEBUG_SCAN, "using SCAN_SSID_FILTER_DISABLED");
cfg->filter_type = SCAN_SSID_FILTER_DISABLED;
} else {
wl1271_debug(DEBUG_SCAN, "using SCAN_SSID_FILTER_LIST");
cfg->filter_type = SCAN_SSID_FILTER_LIST;
}
}
if (!wl1271_scan_sched_scan_channels(wl, req, cfg)) {